Final answer:
The proponent for the 4ID Green Book pamphlet is not specified, but Steven A. Greenlaw and David Shapiro are mentioned as senior contributing authors, suggesting involvement with the content.
Step-by-step explanation:
The proponent for the 4ID Green Book pamphlet is not explicitly mentioned within the provided information. However, looking at the information provided, we can see that Steven A. Greenlaw from the University of Mary Washington, and David Shapiro from Pennsylvania State University are listed as senior contributing authors. This might indicate that they have significant involvement with its contents or related materials. It is, however, important to note that the 4ID Green Book appears to be different from 'The Green Book' mentioned in the provided information, which was a historic travel guide published for Black travelers.