Modular Building Act - This Section, under authority of Tennessee Code Annotated 68-126-301. The Tennessee Modular Buildings Act was established in 1985 with the purpose of establishing building construction standards for factory built structures. The program includes, in addition to housing, all business and commercial buildings that are mass-produced in factories and then transported to building sites to be installed. Manufactured (mobile) homes are excluded from the program. Their regulation is the responsibility of the U. S. Department of Housing and Urban Development (HUD). Use instructions below to read further.