▁the ▁monarch ▁had ▁to ▁be ▁registered ▁at ▁the ▁King ' s ▁Council . ▁This ▁essential ▁form ality ▁was ▁never ▁performed , ▁but ▁it ▁seems ▁that ▁on ▁many ▁occasions ▁French ▁civil ▁law ▁recogn izes ▁the ▁valid ity ▁of ▁this ▁Ag re ement . ▁ ▁The ▁Tre aty ▁has ▁always ▁been ▁fairly ▁applied ▁in ▁practice ▁and ▁is ▁referred ▁to ▁in ▁the ▁following ▁texts : ▁ ▁Franco - D utch ▁Convention ▁of ▁November ▁ 2 8 th , ▁ 1 8 3 9 . ▁( See ▁French ▁text ) ▁ ▁February ▁ 1 1 , ▁ 1 8 5 0 ' s ▁French ▁side ▁g ubern atorial ▁Order ▁about ▁the ▁rules ▁on ▁the ▁salt ▁trade ▁and ▁use , ▁whose ▁Article ▁# 3 2 ▁states ▁: ▁ ▁The ▁inhabitants ▁of ▁the ▁French ▁side ▁of ▁St . ▁Martin ▁will ▁enjoy ▁the ▁ability ▁to ▁consume ▁and ▁export ▁abroad ▁sal ts ▁har v ested ▁by ▁them ▁on ▁the ▁Dutch ▁side , ▁this ▁under ▁the ▁terms ▁of ▁the ▁Tre aty ▁of ▁ 1 6 4 8 . ▁ ▁Dec ree ▁of ▁the ▁ 3 0 th ▁July ▁ 1 9 3 5 , ▁which ▁in ▁its ▁Article ▁# 4 0 ▁provides ▁for ▁the ▁freedom ▁of ▁establishment ▁in ▁the ▁French ▁part ▁of ▁Saint - Martin ▁for ▁the ▁Dutch ▁citizens ▁from ▁the ▁Dutch ▁part ▁of ▁Saint - Martin ▁: ▁ ▁The ▁requirements ▁of ▁the ▁Dec ree ▁shall ▁not ▁apply ▁to ▁foreign ers ▁from ▁the ▁Dutch ▁island ▁of ▁St . Martin ▁regarding ▁their ▁stay ▁and ▁trans it ▁in ▁the ▁French ▁part ▁of ▁the ▁island