The Chief of the Fire Department may enter any building or premises for the purpose of making an inspection or investigation under the provisions of this chapter under the following circumstances:
(A) When the owner or person lawfully occupying the property consents to the inspection;
(B) Pursuant to a warrant obtained in accordance with G.S. § 15-27.2 et seq.; or
(C) When the Chief determines that an emergency exists because the premises to be investigated poses an immediate threat to the safety of persons or property.
(`90 Code, § 8-79)