“There are two categories of practice, the Śikṣaṇa Krama way, according to the rules,
or the Cikitsā Krama way, the application or adaptation of a posture
to suit a particular person or a particular situation.
Where postures need to be adapted to suit particular bodies and their limitations.
The authority for the postures comes from the teacher,
although some rules are indicated in the texts.”
– From study notes with TKV Desikachar England 1992