Center keep

[Snake~eyes]

I don't think your 7-2-5 is a good example of "or". Because that would mean as long as you have 5 players 50-79 on the line then you could have identical jersey numbers.

I interperet the rule as both the requirements must be met.

Because in 7-1-3, a-d is preceded with "shall not:"
Meaning any of those.

But in 7-3-2 it precedes with "it is to:", I interpert that as being all of those requirements.

But I think it could be aruged either way and this could use clarification.

thats my 2 cents.