Question: On what date did the CTRC approve the shut down of CBC's analogue transmitters?
Sentence: On July 17, 2012, the CRTC approved the shut down of CBC's analogue transmitters, noting that "while the Commission has the discretion to refuse to revoke broadcasting licences, even on application from a licensee, it cannot direct the CBC or any other broadcaster to continue to operate its stations and transmitters."
Answer in sentence: yes