The phrase "a valid role for" is correct and usable in written English.
You can use it when discussing the appropriateness or legitimacy of a specific function or position within a context, such as a job, organization, or system.
Example: "In this project, there is a valid role for each team member to contribute their unique skills."
Alternatives: "an appropriate function for" or "a legitimate position for".
There is, of course, a valid role for lobbyists.
There is a valid role for tax cuts at a time of large budget surpluses, especially if they are tailored for an important purpose -- for example, helping low-income families buy health insurance.
Although the study was limited by sample size, the results suggest that there is a valid role for the use of the cement-in-cement revision technique for periprosthetic fractures.
In line with our RNA data, activated Notch1 shifted Sox9 protein expression from undetectable to an intermediate level in ESCs (Fig. 10A) and in 5 d differentiated embryoid bodies from an intermediate to high level expression (Fig. 10A), confirming a valid role of Notch for Sox9 regulation in both undifferentiated and differentiated cells.
Psychologists have a valid role to play in keeping civil aviation safe.
According to our statistical analysis, parameters characterizing ocular circulation, such as retinal and choroidal blood flow and retinal arterial or venous calibers did not play a valid explanatory role for retinal bleeding during a high altitude expedition.
Thus the cooperative could not claim a medical defense for distributing it, even though highly respected medical groups, ranging from the Institute of Medicine to the California Medical Association, have seen a valid if limited role for marijuana in relieving the symptoms of patients who are not helped by pills containing an active ingredient of marijuana or by other treatments.
"On the facts, she performed her role well for five years without makeup, so it is clearly not a valid prerequisite for her role".
Xeroderma pigmentosum appears to be a valid paradigm for the role of DNA repair in BCC in the general population.
IL-1 plays a key role in disc degeneration and could be a valid target for inhibiting this process.
This paper emphasizes how glial cells could play a unique role and transgenic rats could be used as a valid model for diagnostic and therapeutic interventions.
