The phrase "a scheme that allows" is correct and usable in written English.
It can be used when describing a plan or system that provides the opportunity or means for something to happen.
Example: "The new policy introduces a scheme that allows employees to work remotely two days a week."
Alternatives: "a program that enables" or "an arrangement that permits".
It's a scheme that allows people to pay for home improvements over time, through their electricity bill.
Of that, $225m will be redirected to other training programs, including $131m for a scheme that allows private healthcare providers to support undergraduate medical places.
Scientists experimentally demonstrate a scheme that allows the number of qubits encoded per photon to be varied while keeping the overall quantum information constant.
Here he creates an attention-getting flavor with a yogurt shop owner and devises a scheme that allows a pizzeria to guarantee delivery in eight minutes or less.
Since 1996 Missouri has pioneered a scheme that allows self-confessed gambling addicts to add their own names to a voluntary blacklist.
Ballard's papers were acquired as part of a scheme that allows culturally important objects of all kinds to be donated in place of inheritance tax.
We developed a scheme that allowed us to manipulate the nanoelectronic to tissue/cell interfaces while monitoring their electrical activity.
In February this year, it announced "EZ-Pass" - a scheme that allowed businesses to upgrade to its BES 12 platform for free, for a limited time.
Earlier this month, HMRC claimed victory in a four-year battle against Ingenious for a scheme that allowed investors in blockbusters including Avatar to claim tax relief.
Labour MP George Mudie accused the governor of recommending a scheme that allowed him and other bank officials to conduct bank rescues in secret and without proper oversight.
Take That, for example, members of which have recently repaid more than £20m to HMRC after investing in a scheme that allowed them to offset losses involved in a "music investment" plan against other taxable income.
