The phrase "act dictates" is correct and usable in written English.
It can be used in contexts where you are referring to the requirements or mandates set forth by a specific act or legislation.
Example: "The new environmental act dictates that all companies must reduce their carbon emissions by 20% within the next five years."
Alternatives: "law requires" or "regulation mandates".
As expected from its name, the Federal Land Policy and Management Act dictates modern public land management policy.
Not only does this put us in an extremely difficult position professionally, the act dictates what we can and can't say and I feel this is leading us into really dangerous territory as a nation.
For example, Thailand's Foreign Business Act dictates that foreigners cannot own more than 49% of any Thai-registered company's shares.
For example, the United States Endangered Species Act dictates that only species, or distinct population segments of species, are eligible for consideration under the law (Fay and Nammack 1996).
(FISA, or the Foreign Intelligence Surveillance Act, dictates a legal framework for wiretapping and other surveillance).
The Foreign Agents Registration Act dictates that a "conspicuous statement" must be present on disseminated materials, disclosing the relationship between the firm and client.
A spokesperson for the Boundary Commission for England, which will publish its maps on 13 September, said a parliamentary act dictated that the 2015 data was used.
Political broadcasts were not even mentioned in the statute books before the 1990 Broadcasting Act dictated that the ITV network had a legal duty to allocate time for them.
California's Senate Bill 1413 and the federal Healthy, Hunger-Free Kids Act dictate that water be provided in school lunchrooms.
"The Abbott government must abandon its plan to dismantle the Coastal Trading Act, which dictates that ships trading between Australian ports must be crewed by Australian workers, or paid Australian award wages".
Current legislation (Forests Amendment Act 1993) dictates that tawa can only be exploited by small group or individual tree harvesting.
