In aid of reaching reciprocal agreements with other jurisdictions as herein above contemplated, the provisions of this act, and the regulations made thereunder, shall be considered as establishing uniform requirements and regulations throughout the Commonwealth, and nothing herein contained shall be deemed to prevent municipalities or counties which have established or joined in establishing county departments of health from enforcing such requirements: Provided, That no municipality or county health unit shall ordain or enforce requirements related to sanitation, inspections, standards, labeling statements of any kind or descriptions other than those enacted herein or promulgated in rules and regulations hereunder.