There are theoretically two different theories on the scope of administrative act authority: the "limited authority theory" and the other "absolute authority theory".

理论上，行政行为公定力界限存在“有限公定力说”和“完全公定力说”之争。

youdao

And I'm no scientist and I'm no specialist in sort of empirical matters, and believe me, I'm no authority on quantum mechanics, our best theory of fundamental physics.

我不是科学家，也不是实证方面的专家，相信我，关于量子力学，我并没有发言权，那可是基础物理中最经典的理论。

youdao

In theory, Congress could even repeal the Federal Reserve Act altogether since it has the authority to do so.

理论上，国会有权废除美联储的法令。

youdao

And I'm no scientist and I'm no specialist in sort of empirical matters, and believe me, I'm no authority on quantum mechanics, our best theory of fundamental physics.

我不是科学家,也不是实证方面的专家,相信我,关于量子力学,我并没有发言权,那可是基础物理中最经典的理论

耶鲁公开课 - 死亡课程节选

Although, at least in theory, the FTC has the authority to go beyond traditional antitrust analysis and case law when using its authority, the courts have been unkind when the agency has chosen to do so largely because it has never issued clear guidance on what actually constitutes unfair methods of competition.

FORBES: Rumored FTC / Google Settlement: A Model for Tech Industry Antitrust Enforcement

Both the actual data roaming and net neutrality orders are being challenged, by the way, on the sensible and likely successful legal theory that the FCC was never given authority from Congress to sink its teeth so deeply into the Internet economy.

FORBES: The FCC Scores a Hat Trick of Errors on Internet Regulation

In theory, under rules announced by the electoral authority (CNE), candidates will be entitled to just one three-minute television slot a day (and four minutes on radio) during the campaign.

ECONOMIST: The opposition faces some extraordinary obstacles