Applicants with Canadian or US degree credentials can find the academic minimum requirements at http://www.grad.ubc.ca/prospective-students/application-admission/minimum-academic-requirements-canadian-or-us-credentials
Applicants with international degree credentials can find the academic minimum requirements listed by country at
https://www.grad.ubc.ca/prospective-students/application-admission/minimum-academic-requirements-international-credentials
The application process is outlined at http://www.grad.ubc.ca/prospective-students/application-admission/application-process. Prospective students should first consult the individual program that they intend to apply to. The Faculty of Graduate Studies publishes the minimum requirements to be admissible at all to UBC whereas each program will publish their specific requirements that could exceed the minimum requirements.
International applicants follow the same application process as domestic applicants. Detailed information about visa requirements and work rights as well as employment opportunities after graduation can be found in the International Student Guide at
https://students.ubc.ca/international-student-guide