The phrase "ability to assert" is correct and usable in written English.
It can be used when discussing someone's capacity or skill to express or state something confidently or forcefully.
Example: "Her ability to assert her opinions during meetings has greatly improved team dynamics."
Alternatives: "capacity to express" or "skill to declare".
Peace depends on Mr. Campbell's ability to assert authority.
Syria's historic ability to assert control over Lebanon is weakening.
California's leaders also complain about voters' ability to assert their will directly through the state's freewheeling system of ballot initiatives.
One is a legal question over a company's ability to assert intellectual property rights when it dominates a market.
Working with models often requires the ability to assert the compliance of a given model to a given set of constraints.
Lawyers for Sony maintained that by reducing the company's ability to assert its patent rights, the provision "may enable Microsoft to expand its power into new areas".
New York State court, Finra noted, "greatly limits the ability of defendants to assert counterclaims in such actions".
When it is deployed — probably sometime after 2015 — the J-15 will signal the dawn of a new ability by China to assert authority along its coastline.
We are forced to recognize that state surveillance touches all aspects of Internet life, affecting not only the ability of states to assert control in digital spaces but also security, privacy, and the formation of functional civil society groups.
The spectacle also made uncomfortable viewing for leaders in the European Union, where there are also serious concerns about the ability of regulators to assert their authority over the oil and gas industry.
The spectacle in the Gulf also made uncomfortable viewing for leaders in the European Union, where there are also serious concerns about the ability of regulators to assert their authority over the oil and gas industry.
