(a) If for any cause it shall or may be impracticable to hold any session or sitting of any superior or state court at the courthouse or other place provided by law therefor, it shall be lawful to hold court and any session or sitting thereof at such place as the proper authorities of the county in and for which the court is to be held may from time to time provide for such purpose, provided that except as provided in subsection (b) of this Code section no session or sitting of any superior court may be held under this subsection at any place other than the county site of the county of such court.

(b) The provisions of this subsection shall apply only in a county in which there exists a state court with one or more courtrooms regularly utilized by the state court outside the county site. In any such county any session of superior court may be held outside the county site in a courtroom of the state court, subject to the following conditions and limitations:

(1) The senior judge or chief judge of superior court (such terms meaning the active judge who is senior in time of service) must enter a written order for such session of superior court to be so held outside the county site, and such order must incorporate a written finding that it is impracticable for the session of court to be held at the county site;

(2) A judge of the state court must enter a written order consenting for such session of superior court to be held in the courtroom of the state court;

(3) The holding of superior court sessions shall not affect the place of filing of documents to be filed with the superior court, except for documents filed in open court which may be filed where the session of court is held; and

(4) Any state court making courtroom space available to the superior court under this subsection shall be authorized under the same rules to hold sessions of state court in facilities of the superior court.

(c) Notwithstanding the provisions of subsections (a) and (b) of this Code section:

(1) In each county of this state having a population of not more than 50,000 according to the United States decennial census of 1990 or any future such census, if for any cause it shall or may be impractical to hold any session or sitting of any superior or state court at the courthouse or other place provided by law therefor or if it should appear to the governing authority of the county that the best interest of the public would be served by the furnishing of alternate or additional facilities for the holding of any session or sitting of any superior or state court, it shall be lawful to hold court and any session or sitting thereof at such place or places as the governing authority of the county in and for which the court is to be held may from time to time, by appropriate resolution, provide for such purpose, provided that no session or sitting of any superior court or state court may be held under this subsection at any place that is not open to and accessible by the public; provided, further, that no criminal jury trial shall be conducted in such alternate or additional facility without the consent of the accused; and

(2) In each county of this state where the county site is located in an unincorporated area of the county and the governing authority of such county determines by appropriate resolution that the best interest of the citizens of such county would be served by the construction of a courthouse annex or satellite courthouse outside the county site, it shall be lawful to hold any session or sitting of superior or state court or grand jury and to conduct all other related business of the courts at such annex or satellite courthouse.

(d) All acts of a superior court or state court done at a place provided therefor by the county authorities, other than at the county courthouse or other place of holding such court as fixed by law, shall have the same force and effect as if the same had been done at the regular courthouse or other place fixed by law for the holding of such court, including the satisfaction of the requirements of Code Section 15-6-17.