The phrase "authority available" is correct and usable in written English.
It can be used in contexts where you are referring to the presence or accessibility of a person or entity that has the power to make decisions or enforce rules.
Example: "For any further questions regarding the project, please contact the authority available in the office."
Alternatives: "accessible authority" or "available authority".
I co-authored a recent paper in the journal Environmental Law, examining the scope of management authority available to agencies under the Wilderness Act — and that authority is quite large.
The transfer authority provided in paragraph (1) is in addition to any other transfer authority available to the Secretary of Defense.
The transfer authority provided in this subsection is in addition to any other transfer authority available to the Department of Defense.
It describes the sources of legal authority available, where they can be found, and when it is appropriate to do legal research.
In the administration of the National Area the Secretary may utilize such statutory authority available to him for the conservation and management of wildlife and natural resources as he deems appropriate to carry out the purposes of this section.
The Regulations thus drew upon all the sources of authority available to the Secretary with reference to such cases, and purported to set forth definitively the procedures and standards to be followed in their handling.
(Reproduced at Tab U, Special Agent's Legal Authorities, available at http://intranet.state.gov).gov
The Justice Department issued a triumphant press release saying that the case "underscores the department's commitment to address terrorism by using all legal authorities available".
Following such transfer the authorities available to the Secretary in subsection (c) of this section shall likewise be available to the Secretary of the Interior.
Pushback from senators on the panel led Brennan to endorse a "congressional commission" on expanding legal authorities available to US security agencies to access encrypted data, and insisted he did not back a mechanism "perceived as a backdoor".
The provisions of this section (other than paragraph (1) of this subsection) shall be enforced by the agencies specified in section 108 of the Truth in Lending Act (15 U.S.C. 1607) in the manner set forth in that section or under any other applicable authorities available to such agencies by law.
