[1998] A phenomenon (dhamma) with a past object is a condition, by decisive-support condition (upanissaya-paccaya), for a phenomenon with a past object: object decisive-support (ārammaṇūpanissaya), proximity decisive-support (anantarūpanissaya), natural decisive-support (pakatūpanissaya). Natural decisive-support: contemplation of impermanence (aniccānupassanā), contemplation of suffering (dukkhānupassanā), and contemplation of non-self (anattānupassanā) having a past object are a condition, by decisive-support condition, for contemplation of impermanence, contemplation of suffering, and contemplation of non-self having a past object.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.