An institution which is in operation at the time of the adoption of any regulations under section 19a-495, shall be given a reasonable time, not to exceed one year from the date of such adoption, within which to comply with such regulations. The provisions of this section shall not be construed to require the issuance of a license, or to prevent the suspension or revocation thereof, to an institution which does not comply with minimum requirements of health, safety and comfort designated by the Department of Public Health through regulation adopted under the provisions of section 19a-495.