Reply To: HHS/NIH SBIR Land Home › SBIR Land Forums › Institute & Agency Questions › HHS/NIH › Reply To: HHS/NIH at 11:22 pm #644 huawang0Participant Up0Down:: Are there time requirements (e.g., PI needs to spend at least 50% of time) for sub-award PI, Co-Is, and consultants? When do you need a sub-award PI? Do I need letters of support for consultants?