. "ess than 100 acres nor more than 500 acres;(b) the preserve is posted conspicuously with printed notices at intervals of not more than 150 feet apart;(c) the preserve has adequate facilities for parking by members, guests, and clients;(d) towers, holding pens, and other facilities for holding or releasing game birds are in good repair and suitable to the purpose thereof;(e) such other conditions a" . . .