Speaking of this
And where minimum Star Alliance requirements differ from United’s policy, upon request, we will provide the eligible Star Alliance customer with the accommodation.
what are the relevant "minimum Star Alliance requirements", and when and for whom do those minimum Star Alliance requirements come into play? Is this compliance with "minimum Star Alliance requirements" "upon request" of the customer or upon the request of someone else?
Given UA is only going to comply upon request, it's important to know this.