"remain restricted" is a correct and usable phrase in written English.
It means to continue to be limited or confined. Example: Despite the loosening of pandemic restrictions, travel from certain countries will remain restricted for safety reasons.
Yet swaths of shallow continental shelf waters remain restricted from drilling, and coal remains the baseline electrical energy source of choice since the expansion of nuclear power seems caught in an endless political morass.
Former military aircraft will remain restricted to flypasts when over land, with no aerobatic manoeuvres permitted.
In East Lyme, the beach at McCook Point Park will remain restricted to its residents, who pay $20 for their passes, said First Selectman Wayne L. Fraser.
"Yet, despite our open access policy having been in place for over five years, still almost half of these publications remain restricted behind subscription paywalls.
Even if inventories remain restricted and prices continue to soar, don't count on Mr. Ryan to stake a For Sale sign on his Scarsdale lawn anytime soon.
Universally, however, the Gulf's voting franchises remain restricted, and the bodies to which elections are held wield little real power.The least cheering vote came, unsurprisingly, in Bahrain.
Luckily though, the number of overall visitors will remain restricted, guaranteeing, it is hoped, at least another 100 years of relative isolation and pristine wilderness.
In a sign that the emissions scandal will not remain restricted to the US, a Venice court will next month hear a case against VW and Fiat for misleading test advertising.
There are no name-brand fast-food franchises on this 140-square-mile coastal strip of 1.7 million Palestinians, where the entry and exit of goods and people remain restricted and the unemployment rate is about 32 percent.
The flow of intelligence from the US to Britain will also remain restricted until UK law is changed – such exchanges were curtailed after judges in London ordered MI6 to hand over information supplied by the CIA to the legal team of former Guantánamo inmate Binyam Mohamed.
Since theology does not remain restricted to transcendent statements and to an esoteric and sacred realm, and since it rather encompasses all worldly dimensions (cosmology, anthropology, historiography, and other areas), it has always had important significance for cultural evolution and general intellectual life.
