To such extent as may be necessary to assure the proper operation and maintenance of areas and facilities acquired by municipalities or regional authorities pursuant to any program participated in by this state under authority of sections 22a-21 to 22a-26, inclusive, such areas and facilities shall be publicly maintained for outdoor recreation or natural resources purposes, and such city or other local governmental unit shall give such assurances to the state as may be required by the Commissioner of Energy and Environmental Protection, that it has available sufficient funds to meet its share of the cost of the project and that the acquired or developed areas will be operated and maintained at municipal or regional expense for public outdoor recreation or natural resources use.