(a) General rule.--A motor vehicle bearing school bus or school vehicle registration plates shall be used exclusively for the transportation of children and their chaperons to or from public, private, parochial or Sunday school or in connection with any public, private, parochial or Sunday school-related activity. Each school district shall adopt regulations regarding the number of chaperons to accompany students in connection with these activities. Except when transporting children to and from public, private, parochial or Sunday school or public, private, parochial or Sunday school-related activities, the words "school bus" on the front and rear of the vehicle shall be concealed and the red and amber visual signals shall not be operable.
(b) Penalty.--Any person violating this section is guilty of a summary offense and shall, upon conviction, be sentenced to pay a fine of $25.