This section applies only to: Allegany County; Baltimore County; Calvert County; Carroll County; Cecil County; Frederick County; Garrett County; Harford County; Howard County; Montgomery County; Prince George’s County; St. Mary’s County; and Washington County. Except as provided in paragraph (2) of this subsection, the governing body of a county may adopt and enforce rules and regulations relating to the maximum size and weight of motor vehicles that may be operated on county roads. The governing body of a county may not set the maximum weight under paragraph (1) of this subsection at a weight greater than the maximum allowed by the public general laws of the State. Rules and regulations adopted under this subsection shall: have a reasonable relationship to the construction, use, and character of the road; and be designed to assure the continued safety and good condition of the road. A person who violates a rule or regulation adopted under this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 60 days or a fine not exceeding $1,000.