For the purposes of this part, the following terms shall mean and include:

1. 1. "Board of supervisors." The board of supervisors or other elective governing body of a county.
2. 2. "Charter law." A local law providing, amending or repealing a county charter, or transferring a function or a duty pursuant to section thirty-three-a of this chapter.
3. 3. "County." A county of the state except a county in the city of New York.
4. 4. "County charter." An alternative form of county government provided in accordance with the constitution by act of the legislature or local law.
5. 5. "Local law." A local law adopted by the board of supervisors of a county pursuant to this chapter or other statute generally empowering the county to adopt local laws.