All counties which do not have a charter and all counties which have a charter may create a charter commission as provided herein. No provision of this chapter shall be held to alter or restrict any provision of any existing charter, except as hereinafter specifically provided.
HRS § 50-1
Charter framed and adopted under this chapter and State Constitution may be amended by the legislature by a general law.50 Haw. 277,439 P.2d 206.