I speak, with trepidation, because of my former membership in three IRBs. I became a member in two cases because I got in trouble myself. When I was a member I pressed for scrupulous adherence to the law and institutional policy. IRB members and staff are frequently fuzzy on both. As a member I needed to have a copy of the law, the regulations, and institutional policy close at hand.
Your question requires arcane knowledge both of Federal law and of other practices. What you ask might be legally possible but might be foolish. The role of IRBs tends to be expansive. Most institutions require that all research be reviewed according to Federal standards because it makes their job easier. They also usually require that a determination that research need not be reviewed by made at least by the staff of an IRB. Many journals, by no means all, require that research be reviewed appropriately.
There are also state laws that apply. One of the more obscure ones I learned was that our state emancipated all underage women who had a baby for all legal purposes except for the ability to give consent for medical research. Go figure.
In short, your life will be easier if your institution has an IRB and has an agreement with a Federal agency to conduct its own reviews. It will also be made easier if the staff of the IRB understand the actual law, the accreditation standards for IRBs (yes, even those exist), the definition of "generalizable knowledge" (a total mystery), and shows some common sense about what is risky or not, and who is a patient or not.
So while what you ask might be legally possible under some, or even many, circumstances, if you want to participate in modern research with humans or even with animals and then publish that research in credible journals, you need the technical staff that usually support an IRB or an animal research committee.