Duties may be made retroactive.Logical formLearned from3 sentences. A regulation may be made retroactive.Logical formLearned from3 sentences. A decision can be retroactive to a month.Logical formLearned from3 sentences. A sentence can be retroactive to a month.Logical formLearned from3 sentences. A (copyright protection) can be retroactive.Logical formLearned from3 sentences. An agreement can be retroactive to a month.Logical formLearned from3 sentences. Aid can be retroactive.Logical formLearned from2 sentences. Permits can be retroactive.Logical formLearned from2 sentences. A (rule change) can be retroactive.Logical formLearned from2 sentences. A (pricing formula) can be retroactive.Logical formLearned from2 sentences. A (wage hike) can be retroactive to a month.Logical formLearned from2 sentences. A constitutional amendment can be retroactive.Logical formLearned from2 sentences. Retroactive legislation may undergo a prohibition.Logical formLearned from2 sentences. A tax can be retroactive to a month.Logical formLearned from2 sentences. A (counter part) can be retroactive.Logical formLearned from2 sentences.