Voting is open for at least 72h. Any measure is effectively dead with a -1 vote, so if a -1 comes in a minute after voting starts there's really no point in waiting any longer. The value of a 72h window is that it affords more time for dissenters. The voting process is intended to emphasize and produce consensus, which is the most important aspect.
The nomination of a committer requires a vote: a majority of +1 is required and no -1. The vote must happen privately on the cas-pmc mailing list.
Communication happens primarily by public mailing lists. Exceptions are issues that require discretion or confidentiality; private lists are the appropriate channel in those situations. Communication may also occur through other appropriate channels as needed, such as video/voice conference calls, IRC and IM. No official decisions may be made via any means other than voting on a project mailing list; if it didn't happen on list, it didn't happen. Discussions that occur in side channels such as IRC and IM SHOULD be summarized on a mailing list when they may impact decision making processes. The commitee SHOULD make an effort to meet periodically via a high-bandwidth synchronous medium such as in-person meetings at conferences or voice/video conference calls.