An (education rule) can be compulsory.Logical formLearned from2 sentences. Attendance can be compulsory under a law.Logical formLearned from2 sentences. (Labor projects) can be compulsory.Logical formLearned from2 sentences. Religious education can be compulsory in schools.Logical formLearned from2 sentences. Some (practice runs) can be compulsory.Logical formLearned from2 sentences. Compulsory military service may be required of some men.Logical formLearned from2 sentences. (Ice dancing performances) can be compulsory.Logical formLearned from2 sentences. A referendum can be compulsory for a country.Logical formLearned from2 sentences. (Insurance payments) can be compulsory.Logical formLearned from2 sentences. Results can be compulsory for a country.Logical formLearned from2 sentences. Compulsory acquisition can be by a state.Logical formLearned from2 sentences. (Exchange-rate controls) can be compulsory.Logical formLearned from2 sentences. Virginity can be compulsory for (woman cadets).Logical formLearned from2 sentences. Compulsory acquisition may pertain-to shares.Logical formLearned from2 sentences. (Passenger lists) can be compulsory.Logical formLearned from2 sentences.