a new song composed for the occasion, and Liberal Hugh MacDonald argued that no official song was necessary, since Alberta already had an "unofficial song", Alberta Bound (which MacDonald recalled hearing Ian Tyson sing at the closing ceremonies of the 1988 Winter Olympics, although the song, along with Four Strong Winds, was actually sung at the opening ceremonies by Tyson and Gordon Lightfoot, the song's composer and singer). The ensuing competition selected Alberta, composed by Mary Kieftenbeld, as the province's official song. Cao followed this bill with efforts to encourage the translation of O Canada into all languages spoken by Canadians; he composed a Vietnamese version and sang it on the Canadian Broadcasting Corporation. Cao also made headlines in 2007 with the School (Canadian History Content) Amendment Act, which would have mandated that 75% of the instructional hours in high school social studies courses be devoted to Canadian history. Several MLAs spoke in opposition to the bill, including Liberals Bill Bonko (who felt, as a former school trustee, that any percentage should be mandated by local school boards) and Harry Chase, New Democrat David Eggen (who suggested that global history was as or more important than Canadian history), and Progressive Conservative Education Minister Ron Liepert (who agreed with Eggen and who extolled the virtues of the recently implemented existing social studies curriculum). Outside of the legislature, Progressive Conservatives Neil Brown and Len Webber expressed reservations about the decision being made at the political, rather than local, level. The legislature adjourned before the bill came to a vote. Cao also sponsored the Employment Standards (Parental Leave) Amendment Act, which would have combined the provisions for adoptive leave and maternity leave and extended them to 27 weeks (Alberta's maternity leave provisions were, at the time, the least generous in the country). He first introduced the bill in 1999, but the legislature adjourned before it reached second reading. He re-introduced it in 2000, when several MLAs, including Liberals Don Massey, Laurie Blakeman, Linda Sloan, and Percy Wickman and Progressive Conservatives Moe Amery, Karen Kryczka, and Mary Anne Jablonski, spoke in support of the bill on second reading. Only Shiraz Shariff spoke against, citing concerns that the business community hadn't been sufficiently consulted. The bill passed second reading with 34 votes in favour and four (Gary Friedel, Richard Magnus, Barry McFarland, and Rob Renner) against. However, the legislature adjourned while the bill was still