Any research proposal
I need to review and approve submission of any proposal that involves research, regardless of the funding agency or proposal length. Here are the reasons:
1. It will help you improve the proposal. In general, proposals that undergo a friendly review before submission to the granting agency have a better chance of being funded.
2. It will benefit you and the lab in other ways. Once I know you are interested in pursuing a particular line of research, I can keep you in mind for other opportunities. For example, I could point you to other relevant proposal calls, or invite you to co-author related manuscripts with her. I can foster collaborations between you and other colleagues. In addition, I can make sure that the various lines of research within the lab are complementary.
3. I can provide administrative oversight of the research. Since I am the principal investigator, it is my responsibility to ensure that all institutional protocols are followed. I also must make sure that all safety concerns are adequately addressed. To do so, I must be made aware of proposed research.
4. It maintains the reputation of the lab group. Your proposal represents your work, and also gives reviewers an idea of the quality of the work produced by the lab. By submitting only polished, well-revised work, you ensure that reviewers will view the lab favorably. This affects your lab mates as well as yourself.
Any manuscript or conference abstract on which I am a co-author
In academia, any time a person is listed as a co-author, they must be shown the manuscript/abstract and allowed a reasonable chance to respond. Points 1, 2, and 4 (above) also apply.