223:43 also may be in reference to:
restatement(second) of the conflicts of law, sections 223 thru 243 (typically written as 223:43). These sections deal with land and which courts have jurisdiction and which laws will be applied. some of the sections are:

§ 223. Validity And Effect Of Conveyance Of Interest In Land
§ 224. Construction of Instrument of Conveyance
§ 226. Transfer Of Interest In Land By Operation Of Law
§ 228. Mortgage on Land
§ 236. Intestate Succession To Land
§ 239. Validity And Effect Of Will Of Land