The phrase "act vastly" is not commonly used in written English and may not convey a clear meaning.
It could be interpreted as suggesting to act in a significant or extensive manner, but the phrasing is awkward and unclear.
Example: "To achieve our goals, we must act vastly and consider all possible options."
Alternatives: "act significantly" or "act extensively".
The act vastly broadened the power of the Food and Drug Administration to regulate food production.
Jimmy Carter's Middle Income Student Assistance Act vastly increased federal aid by granting access to the middle class.
The Act vastly restricts the rights of prisoners to sue for relief, and deprives the courts of jurisdiction of hearing most alleged-abuse cases.
The 2010 Affordable Care Act vastly increased recognition of the licensed integrative practice fields such as acupuncture and chiropractic.
Patterns of species richness are governed by processes that act at vastly different spatial scales.
The Legal Workforce Act would vastly expand the use of federal electronic databases to screen job applicants, an invitation to discrimination.
The Obama justice department succeeded in convincing the five right-wing Supreme Court justices to dismiss a lawsuit challenging the constitutionality of the 2008 law, the FISA Amendments Act, which vastly expanded the government's authority to eavesdrop on Americans without warrants.
In August the Blair forces pushed through the Utilities Act, which vastly extended the capacity of ministers to influence the regulatory process.
(It also updated the Impaired Driving Act to vastly increase police powers to detect drugged drivers).
Even more disheartening to conservative true believers is the promise that the Affordable Care Act will vastly expand access to contraception by providing insurance coverage for oral contraceptives.
Meanwhile, federal legislators won't allow the Internet Tax Freedom Forever Act, a vastly popular bill, to go to the floor for a vote.
