This scholarly article offers a review of the regulatory history around securities offerings: the Securities Act of 1933, the Securities Exchange Act of 1934, and the JOBS Act of 2012; providing an overview of how these laws interact with each other and whether they achieve their purposes.

Securities regulation in the US, securities registration, registration exemptions

What are the laws regulating securities offerings?

When does a company need to register securities? Are there exemptions?

How did the regulatory environment evolve?

SEC Regulation D - https://www.sec.gov/fast-answers/answers-regdhtm.html