p. vol_II_p089 · #1053« Having pancama as amsa and the same as the concluding note, replete with niṣāda ... this ābhīrī bhāṣā ... rises out of pañcama (rāga) »
Other rules on this concept (1)
R_4p0_021structural ābhīrī = bhāṣā: ṣaḍja initial+concluding, sampūrṇa, ne de deśa, concert ṛṣabha-ṣaḍja, deux-śruti sva