§ 74. Manner of adoption of local laws. A local law authorized by this article shall be adopted in the manner prescribed in the municipal home rule law, or, in the case of a county operating under an alternative form of county government, in the manner provided for such county for the adoption of local laws. Notwithstanding any general, special or local law, a local law adopted pursuant to this article shall not be subject to a mandatory or permissive referendum.