The phrase "as expressly authorized" is correct and usable in written English.
It can be used in legal, formal, or contractual contexts to indicate that an action is permitted specifically by a prior agreement or authorization.
Example: "You may proceed with the project as expressly authorized in the contract signed last month."
Alternatives: "as specifically permitted" or "as clearly allowed".
Except as expressly authorized in Title III, however, all interceptions of wire and oral communications are flatly prohibited.
except as expressly authorized by a law enacted after the date of enactment of this Act that refers to this section.
'A court of the United States may not grant an injunction to stay proceedings in a State court except as expressly authorized by Act of Congress, or where necessary in aid of its jurisdiction, or to protect or effectuate its judgments.' 28 U.S.C. 2283 19588 ed.).
Just as a search authorized by state law may be an unreasonable one under that amendment, so may a search not expressly authorized by state law be justified as a constitutionally reasonable one.
As has been noted the Railway Mail Pay Act expressly authorized the Commission to classify carriers and 'where just and equitable, fix general rates applicable to all carriers in the same classification.' 39 U.S.C. 549, 39 U.S.C.A. § 549.
Section 363 sales of all or substantially all of a debtor's assets should be expressly authorized and are referred to in the Report as 363x sales.
It is only in the exercise of its judicial powers, when sitting as a court for the trial of impeachments, that the Senate is expressly authorized... to consider and decide upon the conduct of the President...
The same section further provides that the decision made by the board of public works shall be final, unless the railroad company, within 30 days after such decision comes to its knowledge, appeals (which it is expressly authorized by the statute to do) from the decision, as to the assessment and valuation made in each county through which the railroad runs, to the circuit court of that county.
You are permitted to be in an underload, defined as a course load of between 3.0 and 3.75 course credits, only if expressly authorized to do so by your academic dean.
None of this was expressly authorized by Oregon partnership and LLC law, which merely says -- as nearly all such statutes do -- that the court may charge (lien) a debtor's interest in such companies until the judgment has been paid in full, and until that time the creditor is only to be consider a voluntary assignee of the interests which carries almost no other rights than the lien rights.
The sale was not expressly authorized, nor authorized by necessary implication.
