[2001] A phenomenon with a future object (anāgatārammaṇo dhammo) is a condition for a phenomenon with a future object by decisive-support condition (upanissaya-paccaya): object decisive-support (ārammaṇūpanissaya), proximity decisive-support (anantarūpanissaya), and natural decisive-support (pakatūpanissaya).
Natural decisive-support: contemplation of impermanence (aniccānupassanā) with a future object, contemplation of suffering (dukkhānupassanā), and contemplation of non-self (anattānupassanā) are a condition, by decisive-support condition, for contemplation of impermanence with a future object, for contemplation of suffering, and for contemplation of non-self.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.