[2004] A phenomenon with a present object (paccuppannārammaṇa-dhamma) [is a condition] for a phenomenon with a present object … — 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) that have a present object are a condition for contemplation of impermanence, contemplation of suffering, and contemplation of non-self that have a present object by decisive-support condition (upanissaya-paccaya).
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.