Photo of Spiros Mantzavinos
D Delaware Senate · District 7 On the 2026 ballot

Sen. Spiros Mantzavinos

Compare
Total votes
2,845
all sessions
Attendance
98%
65 missed
Near the chamber average
With party
99%
of cast votes
Higher than 86% of chamber peers
Bipartisan score
0%
crosses aisle rarely
Lower than 87% of chamber peers
Sponsored
1,281
bills & resolutions
Higher than 90% of chamber peers
Committees
7
assignments
1,281 bills and resolutions

Sponsored bills

Total
1,281
Primary
1,083
Co-sponsor
198
This page
1,281
matching current filters
Primary HB 462
Passed · Delaware House · Lead sponsor
AN ACT TO AMEND TITLE 14 OF THE DELAWARE CODE RELATING TO SCHOOL TAXES.

In 2025, the General Assembly passed House Bill No. 242 (now found at Chapter 135, Volume 85 of the Laws of Delaware), allowing school districts located entirely in New Castle County to use different tax rates for residential and non-residential properties. This Act amends the Delaware Code to continue the authority for non-vocational technical school districts in New Castle County to utilize a residential and non-residential tax rate for school tax purposes. Such a split rate may be established or adjusted in the year after a general reassessment or as part of a referendum. The rate must be uniform for each class of property. Under this Act, the non-residential rate must be at least equal to the residential rate and may be no more than 1.85 times the residential rate. For purposes of the split tax rate, a school district must follow the classifications of the county in which the district is located. Under the transition provisions of this Act, a district that initially established split tax rates under the authority of House Bill No. 242, may continue to use those split rates at the same or a lower ratio between residential and non-residential tax rates established in the 2025-2026 tax year. But if a district’s non-residential tax rate for the 2025-2026 tax year was more than 1.85 times the residential tax rate, it must adjust its rates to meet the 1.85 maximum ratio permitted under this Act. The New Castle County Vocational Technical District may not continue the use of different tax rates past the 2025-2026 tax year. The Act also changes the amount a school district must add to its tax rate to account for delinquencies and late payments to “up to 10%” rather than requiring that a school district must add exactly 10% to its tax rate for this purpose. This Act also makes technical corrections to conform this chapter of the Delaware Code to the Delaware Legislative Drafting Manual and strikes references to the City of Wilmington School District, which no longer exists. It also revises § 1913 of Title 14 to reflect current practice. It strikes an outdated requirement in § 1918 of Title 14 that the school districts deliver a copy of the assessment list to the County along with their tax warrant. This is inconsistent with the role of the school districts and with current practice.

Passed Aug 5, 2026 0 co-sponsors
Primary SB 320
Signed into law · Delaware Senate · Lead sponsor
AN ACT TO AMEND TITLE 16 AND TITLE 24 OF THE DELAWARE CODE RELATING TO PHARMACY AND PHARMACISTS.

This Act modernizes Delaware’s pharmacy practice laws by authorizing pharmacists to practice to the full extent of their education and training. Pharmacists have the expertise necessary to provide patient care beyond what current Delaware law allows, and enabling them to do so is an important step toward expanding access to health care in this State. Under this Act, pharmacists are permitted to independently evaluate patients, identify health conditions, order and prescribe laboratory tests, and prescribe drugs or devices without reliance on statewide protocols, formularies, or specified lists of conditions. Pharmacists may not prescribe controlled substances, with the exception of medications for the treatment of opioid use disorder, which pharmacists may only prescribe under a standing order from the Division of Public Health. In order to enable pharmacists to prescribe medications for the treatment of opioid use disorder under a standing order, this Act also amends the Uniform Controlled Susbstances Act in Chapter 47 of Title 16 to include “pharmacist” in the definition of “practitioner.” To ensure continuity of care, this Act also establishes requirements for documentation of treatment and communication with primary care providers. This Act takes effect immediately, but implementation is delayed by up to 1 year to give the Board of Pharmacy time to implement necessary regulations. This Act does not affect current law regarding the use of statewide protocols, standing orders, or collaborative practice agreements. This Act also makes technical corrections to conform existing law to the standards of the Delaware Legislative Drafting Manual.

Signed into law Jul 29, 2026 0 co-sponsors
Primary HB 460
Signed into law · Delaware House · Lead sponsor
AN ACT TO AMEND TITLE 9 OF THE DELAWARE CODE RELATING TO BUILDING PERMIT INFORMATION.

This Act updates the Delaware Code section that requires municipalities in New Castle County to submit permit data to the County government. The Act clarifies that such information should be submitted monthly in a manner prescribed by the County and that only closed permits where a certificate of occupancy has issued should be reported. If a municipality fails to timely report permit data it must submit a report to the County and the General Assembly detailing the reason for the omission, what steps are being taken to address the problem, and when the information will be submitted. This permit data is necessary for the County to ensure the accuracy of property assessments.

Signed into law Jul 23, 2026 0 co-sponsors
Primary HB 461
Signed into law · Delaware House · Lead sponsor
AN ACT TO AMEND TITLE 14 OF THE DELAWARE CODE RELATING TO SCHOOL TAX.

This Act provides special authority to school districts in New Castle County to reset their tax rate for the 2026-2027 tax year. This authority is necessary because several adjustments to the New Castle County tax roll are continuing to be made after the completion of the general reassessment that took effect for the 2025-2026 tax year. This includes the ongoing adjudication of appeals from the assessment values set in the general reassessment as well as quality control reviews, and potential changes pending in other legislation. This Act allows the New Castle County school districts to adjust the tax rate so that no increase in operating revenue over the prior year will be realized, with two exceptions: (1) revenue increases from approved referenda; and (2) revenue equal to the 5-year average growth rate for each district. The 5-year average growth rates for NCC districts are as follows: (1) Appoquinimink, 3.68%; (2) Brandywine, 0.54%; (3) Christina, 0.32%; (4) Colonial, 1.10%; (5) Red Clay, 0.58%; (6) Smyrna, 0.31%; and (7) New Castle County Vocational Technical, 0.96%. This Act sunsets on March 31, 2027.

Signed into law Jul 23, 2026 0 co-sponsors
Primary HB 429
Signed into law · Delaware House · Lead sponsor
AN ACT TO AMEND TITLE 18 OF THE DELAWARE CODE RELATING TO THE STEP THERAPY EXCEPTION PROCESS.

This Act modernizes Delaware law by adding modern medical treatment options biologics or biosimilars to the step therapy exception process. The current law was passed before biosimilars were widely available. Biosimilars are to biologics what generic drugs are to traditional drugs once their exclusivity expires. This revision adds an exclusion to step therapy protocol exceptions for interchangeable biologics and biosimilars.

Signed into law Jul 23, 2026 0 co-sponsors
Primary SB 317
Signed into law · Delaware Senate · Lead sponsor
AN ACT TO AMEND TITLE 1 OF THE DELAWARE CODE RELATING TO VETERANS MONTH.

Maddy summaryThis bill designates the month of May as "Veterans Month" throughout the State of Delaware. The primary mechanism of the legislation is to amend the Delaware Code to officially recognize this specific time frame for honoring military veterans. Once enacted, the change serves as a formal state acknowledgment rather than creating new laws or funding. It directly affects the state's official records and calendar designations without altering existing programs or benefits.

Signed into law Jul 23, 2026 0 co-sponsors
Primary SB 308
Signed into law · Delaware Senate · Lead sponsor
AN ACT TO AMEND TITLE 26 OF THE DELAWARE CODE RELATING TO THE LOAD FORECAST ACCOUNTABILITY ACT.

This legislation shall be known and may be cited as the “Load Forecast Accountability Act.” Recent reports by PJM Interconnection, L.L.C. (PJM), have highlighted that electricity demand across the PJM footprint, including Delaware, is projected to grow due to data centers, electrification of vehicles and buildings, and other large load additions. PJM recently projected that, by 2030, PJM expects to add 32 GW of load to the grid – 30 GW of which is attributable to data centers. PJM relies upon load forecasts submitted by Commission-regulated electric distribution companies in Delaware to establish system planning needs and capacity requirements which ultimately have costs associated with both. Accurate, transparent, load forecasting is essential to ensure the adequacy of electric supply, maintain system reliability, and protect Delaware consumers from unnecessary costs caused by overbuilding or underbuilding system resources. There is a critical need for the Delaware Public Service Commission to provide oversight of load forecasting inputs from Commission-regulated electric distribution companies, to ensure accuracy and transparency, and to coordinate with PJM and neighboring state regulators to prevent duplicative counting of projects and customer contracts. The purpose of this Act is to provide the Commission with authority and responsibility to: (1) Review and evaluate load forecasts submitted by Delaware Commission-regulated electric distribution companies to PJM; (2) Coordinate with PJM and other states to ensure accurate system-wide planning; and (3) Access all relevant materials, including confidential agreements, necessary to carry out this oversight. Under this Act, the Commission is required to submit a written report to the Governor, the General Assembly, and the Director and the Librarian of the Division of Legislative Services no later than May 1 of each year on its progress in implementing this Act. This report must also be posted on the Commission’s website.

Signed into law Jul 23, 2026 0 co-sponsors
Primary SJR 14
Signed into law · Delaware Senate · Lead sponsor
DIRECTING THE DEPARTMENT OF EDUCATION TO CONDUCT A STUDY AND REPORT ON WORKFORCE DATA RELATING TO PUBLIC EDUCATION SUPPORT PROFESSIONALS.

This Joint Resolution directs the Department of Education to compile and submit a comprehensive report regarding the workforce data and compensation of education support professionals for the most recent school year. The report must identify staffing levels, vacancies, average wages paid, and the number of employees earning below a $40 hourly wage threshold. The Department is further required to recommend pay scales that align with a minimum living wage and submit its findings to the General Assembly and relevant state offices by November 2, 2026.

Signed into law Jul 23, 2026 0 co-sponsors
Primary SB 291
Signed into law · Delaware Senate · Lead sponsor
AN ACT TO AMEND TITLE 11 OF THE DELAWARE CODE RELATING TO REPORTING AND REVIEW OF DEATHS OF INDIVIDUALS IN CUSTODY OF LAW ENFORCEMENT.

In 2013, Congress enacted the Death in Custody Reporting Act of 2013, 34 U.S.C. § 60105, which requires states to report to the U.S. Department of Justice the deaths of individuals who die in the custody of law enforcement. Failure to comply may result in the reduction of certain federal grant funds. In 2024, the Criminal Justice Council, which is responsible for ensuring Delaware's participation in the data collection required by the Death in Custody Reporting Act of 2013, arranged for the Statistical Analysis Center to serve as the Criminal Justice Center's agent to coordinate and manage the logistics of this data collection. The Criminal Justice Council and Statistical Analysis Center issued guidance to law enforcement on the requirements of the Death in Custody Reporting Act of 2013 and the process and procedures to be used to comply with these reporting requirements. This Act codifies the process and procedures established by the Criminal Justice Council and Statistical Analysis Center related to the reporting required by the Death in Custody Reporting Act of 2013. In addition, this Act requires compliance reporting and provides that a law-enforcement agency that fails to comply with this Act is ineligible for certain funding until the agency complies with this Act.

Signed into law Jul 23, 2026 0 co-sponsors
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