OPINION — AG — THE SECRETARY OF STATE MAY CHARGE RURAL WATER DISTRICTS IN OKLAHOMA ONLY COST WHICH ARE SOLEY FOR THE CONVENIENCE OF THE AGENCY AND MUST ABSORB ANY EXPENSE INCURRED IN THE EXERCISE OF HIS OFFICIAL DUTY. CITE: OPINION NO. 65-367, 82 O.S. 1965 Supp., 1306 [82-1306] (SAM HELLMAN)