By Lisa Johnson As Canada prepares Tuesday to blow out 158 birthday candles, Alberta plans three days later to formalize rules making it easier to have an independence celebration of its own. Beginning Friday, Premier Danielle Smith’s United Conservative government is officially lowering the required threshold for citizens to initiate a provincewide referendum, including on separation. Mitch Sylvestre, CEO of the Alberta Prosperity Project, a non-profit group touring Alberta promoting independence, says he plans to apply to Elections Alberta that same day to start a petition under the new rules. The group aims to gather 177,000 signatures within 120 days to put the question on a ballot to voters: Do you agree the province of Alberta shall become a sovereign country and cease to be a province of Canada? “I…