Ann,
The NAR for Boston Women's Ordination Conference ǂd (1980) seems to be clearly for a conference or meeting. The bib record mentions a public hearing. The heading should include the location in the qualifier. If there is also an organization by that name it would probably have to be qualified by (Organization), but there is no need to establish it unless you have resources that require the name. It's also possible that Boston Women's Ordination Conference was the name of an organization that sponsored an otherwise unnamed public hearing in spring 1980.
The Women's Ordination Conference is clearly a corporate body, but I don't see that a clear relationship has been established between the two headings.