The phrase 'authority by' is not correct and it is not usable in written English.
To make it correct, you can use the phrase 'by authority'. For example, "The regulations were issued by authority."
Don't flaunt authority by flouting your ignorance.
Clark lends authority by citing Russian-French falsificatiofs of documents.
Individuals gain authority by being able to resolve uncertainty.
Derelict, imperfect, the city now becomes an authority by default.
The fledgling Palestinian Authority, by contrast, is something else.
Nigel Farage has asserted authority by denouncing Bloom.
In those cases, too, two state judges affirmed local authority by upholding drilling bans.
Mr. Elelaimy defied even his mother's authority by marrying his college sweetheart before graduating in 2002.
It is prepared under his direct authority by the Office of Management and Budget (OMB).
The constitution now placed limits on executive authority by introducing the principle of separation of powers.
We have been granted authority by those who voted for us at the ballot box".
