Complex sentence: For WikiProjects without a formal A-Class review process, the proposal to promote to A-Class should be made on the article's talk page and supported there by two uninvolved editors, with no significant opposes.
Split into simpler sentences: For WikiProjects without a formal A-Class review process, the proposal to promote to A-Class should be made on the article's talk page. To be granted, the proposal should supported by two uninvolved editors, with no significant opposes.