Yes, per AR 40-501, additional medical standards/waivers apply to Army Aviation, and also for "miscellaneous" purposes like airborne school, Ranger school, SERE school, diving schools, deployment, etc. Oddly enough, air assault school doesn't seem to require its own waiver.
These waivers can be applied for, but the process takes time and there are several different waiver authorities that might be involved. A cadet may already have a waiver to contract with ROTC, and have nothing changed in their medical status since then, but would still need a new waiver on the original issue to attend one of the listed schools.
For those with waivers from Cadet Command, this poses another factor to consider in career planning for MOS, active duty vs. reserve commission, etc.