(Certification program) may undergo maintenance.Logical formLearned from13 sentences. Certification can be optional.Logical formLearned from13 sentences. Certification can be in orthotics.Logical formLearned from13 sentences. Some teachers may have (emergency certification).Logical formLearned from13 sentences. Qualifications may undergo a certification.Logical formLearned from13 sentences. A world-association may offer a certification.Logical formLearned from13 sentences. A (type certification) may pertain-to a government-agency.Logical formLearned from13 sentences. A (certification mark) may pertain-to a government-agency.Logical formLearned from13 sentences. A (certification program) may pertain-to a government-agency.Logical formLearned from13 sentences. A governor may undergo a certification.Logical formLearned from13 sentences. A (certification system) can be voluntary.Logical formLearned from13 sentences. Certification can be for graduation.Logical formLearned from13 sentences. A (state certification) may pertain-to a us-state.Logical formLearned from13 sentences. Certification may be issued.Logical formLearned from13 sentences. (Certification services) can be organic.Logical formLearned from13 sentences.