Thanks, I hadn't heard of the term past practices before. I guess I haven't experienced being unionized, and just take it for granted that an employer can make

Thanks, I hadn't heard of the term past practices before. I guess I haven't experienced being unionized, and just take it for granted that an employer can make my life worse if it wanted to. Sort of boggles my mind that a union can negotiate things with the employer in vague terms, and the understanding is that things will always be "just as good" unless explicitly spelled out.