I wanted to provide some further clarification on these questions and answers.
1. We haven't seen a proposal that is a subaward and includes admin/clerical support on it, yet. However, when it does comes through, the % time should reflect the work being done so that may be 15% or higher or lower. It it's lower, there must be additional justification provided as to why it is needed at all. I don't see how it being a subaward would require a waiver for % effort.
2. As already stated in #1, % time budgeted should reflect work being done, which could be spread across multiple individuals so you could have three people spending 5% of their time on the project. Again, it should be clearly outlined in the budget justification of the proposal.