Comments

Comm. NT: 5.
Āyatanavitthārakathāvaṇṇanā

‘In other words, the life-continuum mind’: that which occurs twice in disturbance (see Ch. XIV, note 46).
Only when there has been the occurrence of the life-continuum in a state of disturbance (in a state of dissimilar occurrence) is there the arising of adverting, not otherwise. Taking it thus as the reason for adverting, what is called ‘life-continuum mind’ is a door of arising.
‘Not common to all’ means not common to eye-consciousness and the rest.

пали	Chaṭṭhassa pana bhavaṅgamanasaṅkhāto manāyatanekadesova uppattidvāraṃ, asādhāraṇameva ca dhammāyatanaṃ ārammaṇanti.
Nyanamoli thera	But only one part of the mind base, in other words, the life-continuum mind,5 is the door of arising, and only the mental-data base not common to all is the object, of the sixth [consciousness group].