Maybe a PADI instructor can post their Standards for student equipment. I am not a PADI instructor, and so I have no idea.
Equipment Requirements
1. During all open water training dives, each student diver, certified assistant
and instructor must have:
a. fins, mask and snorkel (Although recommended, Ice Diver, Wreck Diver
and Cavern Diver Specialty course students are not required to have
snorkels.)
b. compressed gas cylinder and valve
c. buoyancy control device (BCD) (with tank mount or separate backpack)
and low pressure inflator
d. regulator and alternate air source
e. submersible pressure gauge (monitoring device)
f. depth gauge (monitoring device)
g. weight system and weights (if necessary for neutral buoyancy)
h. adequate exposure protection appropriate for local diving conditions
i. at least one audible emergency surface signaling device (whistle, air
horn, etc.)
2. During all open water training dives, instructors and certified assistants
must also have a timing device, compass, knife/divers tool (except where
prohibited by law or local regulations) and two surface signaling devices
one audible (whistle, air horn, etc.) and one visible (inflatable surface tube,
flare, signal mirror, etc.).
3. Use a dive flag where required by local law. Consider using a surface
support station with a dive flag.
4. When student divers will use dry suits for the first time during open water
training dives, they must complete a confined water dry suit orientation
session prior to participating in the dives.
You may use the dry suit confined water session in the Adventures
in Diving Program Instructor Guide to conduct this orientation. Its a good
idea to have student divers use dry suits during confined water dives to gain
familiarity and increase comfort.