Okla. Stat. tit. 63, § 63-686.3: Definitions

As used in this act:

1. ”Emergency” means any occasion or instance for which, in the

determination of the President of the United States or the Governor

of the State of Oklahoma, federal or state assistance is needed to

supplement state and local efforts and capabilities to save lives,

protect property, public health and safety, or to lessen or avert

threat of a catastrophe in any part of the state;

2. “Man-made disaster” means a disaster caused by acts of man

including, but not limited to, an act of war, terrorism, chemical

spill or release, or a power shortage that requires assistance from

outside the local political subdivision; and

3. "Unavailable" means absent from the place of session, other

than on official business of the Legislature, or unable, for

physical, mental or legal reasons, to exercise the powers and

discharge the duties of a legislator, whether or not such absence or

inability would give rise to a vacancy under existing constitutional

or statutory provisions.