The original version of this statement can be found on the website of Prof. Kasar Rafi at the University of Toronto, who is one of the initiators of this project.
“We refuse to compromise the ideals of academic freedom and open exchange. We affirm that scientific events have to be open to everybody, regardless of class, financial situation, race, sex, religion, national origin, sexual orientation, gender identity, disability, age, pregnancy, immigration status, academic affiliation, or any other aspect of identity.
We believe that such events have to be supportive, inclusive, and safe environments for all participants. We believe that all participants are to be treated with dignity and respect. Discrimination and harassment cannot be tolerated. We are committed to ensuring that the scientific events in which we participate follow these principles, and we request that organizers of scientific events make explicit statements on the event website to that effect.”
In this context, I also recommend the colloquium talk by Dr. Lisa Willis, who spoke about how science would benefit from making it more diverse and welcoming for everyone.