Provision shall be made for at least two offstreet parking spaces, one of which may be a garage, for each dwelling unit hereafter erected. Driveways and parking areas shall be constructed in accordance with subsection 13-19.6. Non-residential uses permitted in residential zone districts shall provide the number of parking spaces required by the specific use as prescribed in subsection 13-19.2. Provisions relating to the parking and storage of recreational vehicles shall be in accordance with requirements specified in subsection 13-19.5.