The Web Hypertext Application Technology Working Group (WHATWG) announced that it has adopted a formal governance structure:
The WHATWG has operated successfully since 2004 with no formal governance structure, guided by a strong culture of pragmatism and collaboration. Although this has worked well for driving the web forward, we realized that we could get broader participation by being clear about what rights and responsibilities members of the community have. Concretely, this involves creating an IPR Policy and governance structure.
Further working mode changes at WHATWG is a post from CSS-Tricks