(a) The powers granted to a local jurisdiction under this subtitle do not:
(1) grant the local jurisdiction powers in any substantive area not otherwise granted to the local jurisdiction by any other public general or public local law;
(2) restrict the local jurisdiction from exercising any power granted to the local jurisdiction by any other public general or public local law or otherwise;
(3) authorize the local jurisdiction or its officers to engage in any activity that is beyond their power under any other public general or public local law or otherwise; or
(4) preempt or supersede the regulatory authority of any unit of the State under any public general law.
(b) (1) If a legislative body regulates off–street parking, the legislative body shall require space for the parking of bicycles in a manner that the legislative body considers appropriate.
(2) A legislative body may allow a reduction in the number of required automobile parking spaces based on the availability of space for parking bicycles.