Sewage holding tanks. Responsibility for ensuring compliance with chapter, §12-15-6. Water wells. Bond or letter of credit, §12-5-135. Fines, §12-5-133.1. Licenses, §12-5-127. Contents of license, §12-5-128. Display of license, §12-5-128. Electrical or plumbing work incidental to well work. Electrician or plumbing licensing not required, §12-5-131.1. Suspension and revocation of licenses, §12-5-129. Unlicensed operation, §12-5-133. Violation of provisions. Two year ineligibility for licensing, §12-5-127. Notification requirements by council, §12-5-131. Seizure of drilling equipment used in commission of violation of provisions, §12-5-129. Unlicensed operation, §12-5-133. CONTRACTS. Consideration. Lake Lanier Islands development authority. Lease payments by authority as constituting good, valuable and sufficient consideration, §12-3-317. Georgia music hall of fame authority. Conflict of interest involving contracts or transactions, §12-3-532. Ground water. Prospecting for underground water supplies, §12-5-72. Hazardous materials and wastes. Solid waste handling, etc., services, §12-8-77. 1249 INDEX CONTRACTS —Cont’d Jekyll Island-State Park Authority. Revenue bonds. Part provisions as constituting contract with bondholders, §12-3-265. Subdivision, lease, sale, etc., of island by authority. Generally, §§12-3-241 to 12-3-251. Lake Lanier Islands development authority. Conflicts of interest involving authority members, employees, etc. Voiding of contract or transaction, §12-3-340. Lease payments by authority.