"that guarantee that" is correct and usable in written English.
You can use it to suggest that something is certain or guaranteed. For example, "This contract includes a clause that guarantees that payment will be received on time."
Jindal's caper violates state laws that guarantee that body's political independence.
In front of the Head of Missan's Human Rights Committee and other Governorate Council members, a member of Missan's Children's Parliament stated "we call on the government to pass legislations that guarantee that child rights are protected according to the 54 articles of the Convention on the Rights of the Child, which will be for the good of all children".
Let your lawyer take actions that guarantee that your involvement in the hush agreement will come to light.
In Europe, the local industry has been protected by state subsidies and by Continent-wide rules that guarantee that broadcasters screen a minimum of European programming.
Almost every other product Americans encounter is subject to laws that guarantee that the producer suffers when its product is subpar.
Some passengers and business partners, like the automaker Audi, already voluntarily pay small surcharges for carbon-free transport packages that guarantee that green power is used.
Then, any voting strategy (sigma _4^{EA}) that guarantees that policy E is implemented with probability 1 is a best response.
(It refused to cooperate with the Gaza war investigation that guaranteed that its side of the story wasn't heard).
Her technique is the secure fortress that guarantees that she never has to venture outside and brave the elements.
Mr. Pozen put changes in place that guaranteed that the funds' returns were less volatile, analysts said.
Furthermore, Proposition 2 implies a condition that guarantees that the proposition holds.
