The phrase "are required to specify" is correct and usable in written English.
It can be used when indicating that someone must provide specific information or details about something.
Example: "All applicants are required to specify their qualifications in the application form."
Alternatives: "must indicate" or "are obligated to detail".
Because the sound speeds do not depend on direction of propagation, only two elastic constants are required to specify acoustic properties of icosahedral quasicrystals.
Efficient methods of analysis are required to specify and verify such DI systems.
Arabidopsis thaliana APETALA3 (and) Antirrhinuminumajusus DEFICIENS (DEF MADSS box genes are required to specify petal and stamen identity.
These proteins, which must form heterodimers to function, are required to specify petal and stamen identity during flower development.
Companies are required to specify R&D spending in their financial statements, but this measure alone doesn't tell us anything about the quality of the research.
If so, we are required to specify how we should pick out and assess the relata in this comparison, which is trickier than it may at first appear.
If the company fails to spend the prescribed amount, the board in its report is required to specify the reasons.
As in binary ionic compounds, when a metal that can form multiple cations is present, a Roman numeral is required to specify the charge on the cation.
Trade involving those items is to be reviewed by the Chinese government, and companies will be required to specify to whom and for what purpose such shipments are being made.
And while the state plans to go further than elsewhere in the country in terms of disclosure -- companies will be required to specify the chemicals and formulas they use, even those considered proprietary, to state officials if not always to the public -- environmentalists point out that the draft does not prohibit the most toxic chemicals used in fracking, like benzene.
FINANCIAL TIMES A Proposed Change for Hedge Fund Fees | Robert Brown, director of curriculum projects at the CFA Institute, proposes in The Financial Times that hedge fund managers be required to "specify within the fund's legal documents what complexion of betas they will manage or benchmark the portfolio to.
