▁theories ▁The ▁assembly ▁was : ▁ ▁the ▁Third ▁D á il , ▁the ▁successor ▁of ▁the ▁First ▁D á il ▁( 1 9 1 9 – 1 9 2 1 ) ▁and ▁the ▁Second ▁D á il ▁( 1 9 2 1 – 1 9 2 2 ) ▁according ▁to ▁Irish ▁political ▁theory ; ▁and ▁ ▁the ▁Pro vis ional ▁Parliament , ▁the ▁successor ▁of ▁the ▁House ▁of ▁Commons ▁of ▁Southern ▁Ireland ▁( 1 9 2 1 – 1 9 2 2 ) ▁according ▁to ▁British ▁political ▁theory . ▁ ▁Both ▁theories ▁agree ▁that ▁it ▁was ▁a ▁constitu ent ▁assembly ▁which ▁created ▁the ▁constitution ▁of ▁the ▁Irish ▁Free ▁State . ▁ ▁Ireland ▁since ▁ 1 9 1 9 ▁had ▁been ▁govern ed ▁under ▁two ▁rival ▁political ▁theories . ▁To ▁national ists ▁and ▁republic ans , ▁an ▁assembly ▁of ▁Irish ▁members ▁of ▁parliament ▁( who ▁adopted ▁the ▁equivalent ▁Irish ▁language ▁term ▁Te ach ta ▁D á la ▁or ▁T D ) ▁had ▁formed ▁in ▁Dublin ▁in ▁ 1 9 1 9 ▁and ▁was ▁seen ▁as ▁the ▁valid ▁parliament ▁of ▁the ▁Irish ▁people , ▁from ▁which ▁the ▁Irish ▁Republic ▁received ▁its ▁so vere ig nt y . ▁Each ▁D á il ▁in ▁turn ▁was ▁the ▁successor ▁of ▁the ▁earlier ▁one ▁and ▁the ▁legit imate ▁parliament ▁of ▁the ▁Irish ▁Republic . ▁The ▁Second ▁D á il ▁had ▁been ▁chosen ▁through ▁an ▁election ▁in ▁ 1 9 2 1 ▁called ▁by ▁the ▁British ▁administration ▁in ▁Ireland , ▁the ▁elected ▁republic an ▁members ▁forming ▁themselves ▁into ▁the ▁Second