"it is only relevant" is correct and usable in written English.
You can use it to emphasize that a certain thing is the only important point to consider. For example, "It is only relevant that the project is completed on time."
Since it works because banks' funding costs rise as they take on more wholesale debt, it is only relevant for banks that have a shortfall of customer deposits.
There is a lot of lore to read, but it is only relevant and interesting when it becomes part of the character's story; delving into the in-game "cyclopedia" to understand the full background is not a necessarily an appealing prospect.
It is only relevant that it provides a distinguishable set that is part of the population studied.
First, it is only relevant for roles that have a direct impact on the customers, such as product design, sales, and support.
The STB method is therefore not appropriate for studying, for example, the duration of crimes or of transportation between school and home; it is only relevant for establishing the frequency and contexts of such activities.
It has been experimentally demonstrated that coagulation can be neglected in comparison to deposition when total suspended particles (TSP) concentration is under 1×103particles/c m3, and for ultrafine particles (<0.1μm) it is only relevant above 1×104particles/c m3.
While a TV remote is incredibly useful, it's only relevant when you're watching TV.
"It's only relevant when you do that act in public".
"It's only relevant if it happened," Chief Justice John G. Roberts Jr. told Mr. Garre, adding, "But we don't know how we determine whether it happened or not".
To those who say it's only relevant in the UK, the point is that it should encourage designers everywhere to consider the unconsidered.
The act had been used successfully just once before this year, because it usually is only relevant when the presidency shifts parties and a new administration wants to invalidate actions of a previous one.
