"necessity of maintaining" is correct and usable in written English.
You can use it when discussing the importance of protecting or preserving something. For example, "We must recognize the necessity of maintaining a high level of public safety."
Women should be counseled about the long-term efficacy and about the necessity of maintaining training.
For decades, Cal Fire has emphasized the necessity of maintaining defensible space around structures in wildland areas.
This feature precludes the necessity of maintaining the cold chain, making RNA vaccines particularly practical for developing countries.
The answer will rankle some readers, but not those who grok Heinrich's central message — the necessity of maintaining sound natural ecosystems.
The lessons described range from the necessity of maintaining control over high-performing team members to the importance of observation and the inevitability of change.
They accepted the necessity of maintaining defense but postulated the existence of a basic harmony of interests among states, which would minimize the incidence of wars.
One way of maintaining the necessity of consciousness to mind that can preserve some space for mind that is not conscious is Searle's (1990 , 1992.
Thereby it has lost for us genuine truth and life, and has rather been transferred into our ideas instead of maintaining its earlier necessity in reality and occupying its higher place.
This may seem counterintuitive but makes sense from the perspective of maintaining body temperature, a mammalian necessity.
Ricketts didn't address the fiscal aspects of maintaining the death penalty but repeatedly pressed its necessity for maintaining public safety and justice.
A referee may be too close to the ball – and long spells of inactivity may dull that fine edge of alertness that single control of necessity maintains so sharp and keen.
