(Certification periods) can be short.Logical formLearned from7 sentences. (Service providers) may undergo a certification.Logical formLearned from7 sentences. (Certification authorities) may undergo an establishment.Logical formLearned from7 sentences. A certification may be required by a final rule.Logical formLearned from7 sentences. Members may undergo a certification.Logical formLearned from7 sentences. A training may undergo a certification.Logical formLearned from7 sentences. A (teaching certification) can be elementary.Logical formLearned from7 sentences. Purposes may pertain-to a certification.Logical formLearned from7 sentences. A certification can be from a (health care provider).Logical formLearned from7 sentences. A certification may be signed.Logical formLearned from7 sentences. A certification may pertain-to an organization.Logical formLearned from7 sentences. Some tests may be performed during certification.Logical formLearned from7 sentences. Standing may undergo a certification.Logical formLearned from7 sentences. Aircrafts may undergo a certification.Logical formLearned from7 sentences. A design may undergo a certification.Logical formLearned from7 sentences.