A type of Sāmācārī (rules of conduct qua etiquette, formality and convention);
to stay with the Ācārya (preceptor) and the like, belonging to other Gaṇa (religious sub-order), in order to gain knowledge and the like; to accept their discipleship for a specific period.
ācaryāntarādisannidhau avasthāne upa-sāmīpyena sampādanaṃ gamanaṃ... upasampad- iyantaṃ kālaṃ bhavadantike mayā"sitavyamityevaṃrūpā.
(U 26.7 SāVṛ Pa 535)