S.C. Code § 23-9-310
In each city or town which has a regularly organized fire department under the control of the mayor and council or intendant and council of that city or town and in each unincorporated community having a population of two hundred fifty persons within an area of one mile radius in this State which has a regularly organized fire department under the control of a responsible authority or representative group of citizens in the community having in serviceable condition for fire duty fire apparatus and necessary equipment belonging thereto to the value of ten thousand dollars and upwards and having a total personnel of not less than ten men, including paid and volunteer members, deriving benefits from the provisions of this article, there must be appointed a local board of trustees, to be known as the trustees of the firemen's insurance and inspection fund, to be composed of three or five members.
S.C. Code § 23-9-310