GOV § 23178

Whenever a common boundary between counties has been legally established in accordance with Article 3 of this chapter, or by judicial proceedings, a certified copy of any instrument recorded in one of such counties affecting title to real property so established to be situated in an adjoining county may be recorded in the office of the recorder of such adjoining county, with the same force and effect as if the original instrument had been recorded in such adjoining county and the real property mentioned therein had been described as situated in such adjoining county.