Regional Authorities and Special Districts - As enacted, requires an entity that contracts with the Megasite Authority of West Tennessee for a real estate interest in the megasite to report, or cause its contractor or contractors to report, certain information to the state building commission, the speaker of the senate, and the speaker of the house of representatives regarding construction activity for material improvement to the project; authorizes a local governmental entity to enter into a contract with an entity working on the megasite for the provision of security services at the megasite. - Amends TCA Title 64, Chapter 9, Part 1.