Uniform Controlled Dangerous Substances Act; adding certain substance to Schedule I. Effective date.

Changed document title from 'Committee Substitute' to 'Engrossed Senate' with updated sponsor attribution to reflect the bill's progression through the legislative process.

Replaced page footer text from 'Req. No. 1639' to 'SB860 HFLR' to indicate this is the House Floor version of the bill.

Adjusted line numbers and spacing throughout the document to match House Floor formatting standards.

The bill header was changed from 'ENGROSSED SENATE' to 'COMMITTEE SUBSTITUTE', indicating this version was revised by a legislative committee before final passage.

The page numbering and formatting of the substance lists were updated, with page numbers changing from 'ENGR. S. B. NO. 860' to 'Req. No. 1639'.

The numbering of hallucinogenic substances in Schedule I was reorganized and renumbered, particularly in the section listing substances like 2,5-dimethoxy-4-ethylthio-phenethylamine and related compounds.

Minor formatting adjustments were made throughout the document, including spacing and line breaks, without altering the substantive legal content.

Added four new substances to Schedule I: 2,5-dimethoxy-4-(2-fluoroethylthio)-phenethylamine (a synthetic phenethylamine), 5-methoxy-N,N-dimethyltryptamine (a tryptamine derivative), N-methyltryptamine (a tryptamine), and A-ethyltryptamine (a tryptamine). These substances are now classified as Schedule I controlled substances, meaning they have no accepted medical use and a high potential for abuse under Oklahoma law.