The supervisor has general supervision over all associations and corporations subject to the provisions of the Savings and Loan Act. He may promulgate general regulations for the administration and enforcement of the Savings and Loan Act. He shall enforce the purpose of the Savings and Loan Act by use of the powers therein conferred and by reference to the courts for injunctive or other relief whenever necessary. The regulation-making power of the supervisor shall not be exercised unless notice of the terms or substance of the proposed regulation or amendment to existing regulations has been given to all associations subject to regulation under the Savings and Loan Act, by mail, and if, within twenty days after issuance of the notice, as many as two associations request a hearing on the proposal, the supervisor shall call a hearing at which any interested party may present evidence or argument relating to the proposal. After consideration of any relevant matter available from the files and records of the supervisor or presented at the hearing, any regulation or amendment approved and adopted pursuant to the hearing shall be promulgated in written form and the effective date thereof fixed by order of adoption and promulgation. Within thirty days thereof, any party aggrieved may appeal from the ruling under the provisions of the Savings and Loan Act by giving notice of appeal, which shall be served on the supervisor and all parties of record in the manner provided by law for the service of summons in civil proceedings.