A kind of Prāyaścitta (expiation);
when a monk/nun goes on committing offences (without making the proper confession) or indulges in activities against the religious order or transgresses the limit of the expiation called tapa, he/she has to undergo the Cheda Prāyaścitta in the form of lowering of his/her seniority minimum by five days upto maximum by six months.
chedo avarādhopacaeṇa sāsaṇavirtiddhādisatnāyāreṇa vā tavārihamatikkaṃtassa paṃcarāimdiyādipavvajjāvicchedaṇaṃ.
(ĀvaCū 2 p. 247)
paṇagāi paṇagavuḍḍhī, doṇha vi chammāsa niṭṭhavaṇā.
(BṛBhā 707)