A kind of Pratyākhyāna (1) (formal resolve (vow) of abstinence));
in which an ascetic undertakes the Pratyākhyāna that he would definitely perform a particular type of penance on the decided day, whether he might be healthy or not.
'niyaṃṭiyaṃ' ti nitarāṃ yantritaṃ- pratijnātadinādau glān atvādyan tarāyabhāve 'pi niyamātkarttavyamiti.
(Sthā 10.101 Vṛ Pa 472)