In its planning functions, the district may, in its discretion, use the gulf regional planning commission as the planning instrumentality of the district. Each county and city within the district, including those counties or cities not associated as members of the district, shall make available to the district their current zoning ordinances, building codes, housing codes, subdivision regulations and all other codes which such cities or municipalities are authorized to adopt, and shall furnish the district from time to time with copies of all revisions, amendments or supplements to such ordinances, regulations or codes. The district is authorized to propose, but shall not have the power to compel, the adoption of uniform ordinances, regulations and codes pertaining to such matters, and may serve as a clearing house for the dissemination of information relating to planning matters between the counties, cities and other municipalities within the region.