(a) Offense defined.--Notwithstanding any other provision of this title, a person shall not drive, operate or be in physical control of a school vehicle or a commercial motor vehicle while having any alcohol in his system.
(b) Penalty.--
(1) A person who violates subsection (a) while driving, operating or in physical control of a commercial motor vehicle commits a summary offense and shall, upon conviction, be sentenced to pay a fine of $100. A person who drives, operates or is in physical control of a commercial motor vehicle while having alcohol in his system or who refuses to take a test to determine his alcohol content as provided by section 1613 (relating to implied consent requirements for commercial motor vehicle drivers) shall be placed out of service for 24 hours.
(2) A person who violates subsection (a) while driving, operating or in physical control of a school bus or a school vehicle commits a summary offense and shall, upon conviction, be sentenced to pay a minimum fine of $250, and, for a person convicted of a second or subsequent offense, the sentencing court shall order the person to pay a fine of $500. A person who drives, operates or is in physical control of a school bus or a school vehicle while having alcohol in his system or who refuses to take a test to determine his alcohol content as provided by section 1613 shall be placed out of service by his employer for 30 days.