Ideally yes. Taking action rather than talking about the issues is a cornerstone of the Male Champions of Change strategy. Credibility is established, conviction is clear and momentum builds faster when all leaders participate.
Sometimes this is not possible. For example, differing operating approaches, organizational maturity or size may stand in the way of participation by all. Differing governance structures between the public and private sector or local and multi-national organisations may also prevent participation by all in a few cases.
In all cases, the Male Champions strive to participate to the extent to which they have the authority and influence to do so.