Washington ? Thrill-seekers looking to blast into space would need to be informed in writing of serious risks and promise not to sue the government under the first rules for commercial space travel.

The rules issued Friday by the Federal Aviation Administration mandate training and medical fitness evaluations for crew members, preflight testing and other steps companies must take before getting licenses to carry paying passengers into the beyond.

The rules apply to American companies launching from anywhere in the world, and to foreign companies launching from U.S. soil.