Members of the Alberta legislature were up through the night as the NDP staged a filibuster over proposed changes to labour legislation.

Some Alberta businesses are vowing to continue paying all their employees $15 or more an hour, even after Alberta's minimum wage changes kick in later this year.

Alberta is cutting the minimum wage for young workers and making other changes to overtime, holiday pay and votes for union certification.

Alberta's NDP says Opposition Leader Jason Kenney needs to explain what regulations and labour rules he plans to cut if he wins power. 

Are Alberta labour laws as good as those in Oregon?

Legislation passed by the Alberta NDP mandates up to five days of job-protected unpaid sick leave, three days of bereavement leave for the loss of a family member and up to 16 weeks for long-term illness or injury

The Alberta government says legislation to update workplace rules could come as early as next week.

Alberta's opposition parties presented a united front on Tuesday as they called for the NDP government to allow more time for consultation before it considers introducing what could be significant changes to the province's labour laws.