Wearings can be compulsory.Logical formLearned from43 sentences. A curriculum can be compulsory.Logical formLearned from42 sentences. (Student fees) can be compulsory.Logical formLearned from42 sentences. Years can be compulsory.Logical formLearned from41 sentences. An (union membership) can be compulsory.Logical formLearned from41 sentences. A study can be compulsory.Logical formLearned from40 sentences. A repatriation can be compulsory.Logical formLearned from38 sentences. A labeling can be compulsory.Logical formLearned from38 sentences. (Licensing provisions) can be compulsory.Logical formLearned from37 sentences. A transfer can be compulsory.Logical formLearned from37 sentences. A military service can be compulsory.Logical formLearned from36 sentences. A law can be compulsory.Logical formLearned from36 sentences. A (school attendance law) can be compulsory.Logical formLearned from35 sentences. A superannuation can be compulsory.Logical formLearned from35 sentences. A licensee can be compulsory.Logical formLearned from35 sentences.