四分律行事鈔資持記 3.64

3.64

捨法中。注準《僧祇》者，《十誦》缺文故。《注羯磨》云：一說便止。所以前受不取《僧祇》者。以加受為持，持護既別，故須取類。捨是棄背，彼此無乖，隨用通得。一時受捨者，謂三衣一併加也。但得小罪，理應法成。

Under "The Method of Relinquishment": the note's reliance on the Mahāsāṃghika-vinaya is because the Daśādhyāya-vinaya lacks the text. The Annotated Karmavācanā states: "One stops after a single recitation." The reason why the previous reception did not take from the Mahāsāṃghika-vinaya is that receiving with additions constitutes maintenance; since maintaining and protecting are distinct, one must select the appropriate category. Relinquishment is abandoning and turning away, wherein neither side conflicts, so using either is valid throughout. Receiving and relinquishing all at once refers to ritually adding the three robes all together. It incurs only a minor offense, and in principle the ritual is valid.