Neither this chapter, nor any part thereof, nor any grant or deed made under the authority hereof shall operate to divest the State of Georgia of jurisdiction over any lands; and all civil and criminal process issued under the authority of any laws of this state may be executed in or on any part of the lands or premises devoted to the use of the intracoastal waterway or to any use incidental thereto, to the same effect as if this chapter had not been enacted and as if the grant or deed had not been executed.