If it appears to the board of supervisors of any county owning a county cemetery that:
(a) It is necessary that the property be used for other purposes, and
(b) The cemetery is located on a portion of the site of an existing county institution maintained for the relief of the indigent, sick and afflicted, and
(c) Adequate facilities are otherwise provided for by the county for the burial of the indigent dead;
the board may, by following the procedure contained in this article, order the disinterment and removal of all humam remains interred in such cemetery.