Purva-Mimamsa in its Sources c28.s3.21

c28.s3.21

That the duties of the Priests are regulated by the names (of the Acts and of the Priests) is the general rule; but there are exceptions to this. For instance, in certain cases, there are distinct texts enjoining the performance of a certain act by a particular priest. For instance, there is the text laying down that '*the Maitrāvaruṇa-Priest gives directions and recites the Puronuvākyā*' (Tai. Br. 3. 12. 9. 5), where the two functions of giving directions and reciting are specifically assigned to the *Maitrāvaruṇa-Priest*, though, under the general rule, the work of giving directions falls within the scope of the '*Adhvaryu's functions*', and reciting is an act falling within the scope of the '*Hotṛ's functions*'; but in view of the direct Injunction quoted, the said functions are performed by the *Maitrāvaruṇa-Priest*.