This subtitle applies to St. Mary’s County.

Except as provided in subsection (b) of this section, land or buildings may not be used for chemical or catalytic manufacturing, chemical fabrication, gasoline processing, or refining of petroleum or petroleum products. Subsection (a) of this section does not apply to land or buildings used: on or before July 23, 1974, for chemical or catalytic manufacturing, chemical fabrication, gasoline fabrication, gasoline processing, or refining of petroleum or petroleum products; or on or after July 1, 1980, for manufacturing alcohol fuel.

Except as provided in subsection (b) of this section, any land or building used for races or speed contests involving automobiles or other vehicles, as defined in § 11–176 of the Transportation Article, shall cease operation: by 12:30 a.m.; or if a race or speed contest is in progress at 12:30 a.m., within 30 minutes after the conclusion of that race or speed contest. The required closing time for land or buildings under subsection (a) of this section does not apply to areas used for the operation of concessions or to a passage used as an entrance to or exit from the concession areas.

Notwithstanding § 4–302 of this article, the members of the board of appeals may be appointed to terms of 1 to 3 years. The terms of the members of the board of appeals shall be staggered.

Section 5–301 of this article does not apply to the sale or negotiation for sale of industrial property.

A property deeded before January 1, 1994, and improved with a residence before January 1, 2007, is exempt from the subdivision regulations adopted by the county under Title 5 of this article for purposes of constructing additions to the residence or accessory buildings.