[520] A phenomenon (dhamma) accompanied by equanimity (upekkhā) is a condition for a phenomenon accompanied by rapture (pīti) by immediacy condition (anantara-paccaya).
That is: death consciousness (cuti-citta) accompanied by equanimity is a condition for rebirth consciousness (upapatti-citta) accompanied by rapture; adverting (āvajjanā) is a condition for the aggregates (khandhā) accompanied by rapture; the resultant mind-element (vipāka-manodhātu) is a condition for the resultant mind-consciousness element (vipāka-manoviññāṇa-dhātu) accompanied by rapture; the life-continuum (bhavaṅga) accompanied by equanimity is a condition for the life-continuum accompanied by rapture; the wholesome and the unwholesome (kusalākusala) accompanied by equanimity are a condition for emergence (vuṭṭhāna) accompanied by rapture; the functional (kiriya) is a condition for emergence; fruition (phala) is a condition for emergence; for one emerging from cessation (nirodha), the sphere of neither perception nor non-perception (nevasaññānāsaññāyatana) is a condition for fruition attainment (phala-samāpatti) accompanied by rapture — by immediacy condition.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.