The phrase "allow them to maintain" is correct and usable in written English.
It can be used when granting permission for someone to continue or uphold a certain condition or state.
Example: "The new policy will allow them to maintain their current benefits while transitioning to the new system."
Alternatives: "permit them to keep" or "enable them to sustain".
This is the only thing that will allow them to maintain support".
"Having an office close to Brussels would allow them to maintain influence post any deal," the second source said.
For Lahore's upper class, these assets are everything – life preservers that allow them to maintain their precarious position above the grimy, impoverished world inhabited by their servants.
Continued ownership of the property would allow them to maintain possession over land to which they no doubt have an emotional attachment.
The sustained health, wealth and vitality that so many people over age 65 enjoy allow them to maintain domestic independence far longer than previous generations did.
In 2000, they began drafting a plan to resettle on the mainland, in a location that would offer protection from hurricanes and flooding yet allow them to maintain their cultural identity, including access to traditional fishing and agriculture.
They moved their left hind legs outward and rotated them, an off-kilter motion that allowed them to maintain altitude.
It allows them to maintain a connection to the scene there, even though they are, in many respects, U.C.B. dropouts.
"They wanted space, they wanted two full baths and they wanted senior living that allowed them to maintain their independence".
The Kurds have demands that include allowing them to maintain their control over local government and security forces.
The victory was the Celtics' sixth in a row and allowed them to maintain their Boston Garden supremacy over the Knicks.
