LL and an AGI

Can a LL apply for an AGI if they were charging a higher rent before covid and reduced rent during covid. They were then subsequently increasing from that reduced rent annually but are asking for significantly more at renewal.

I obviously denied the above guideline rent they presented but I’m curious if they can apply to the board for an AGI if they were earning a lot more before and other units in my building are also significantly higher than what I am paying.

TIA!