is any job position that makes more money a bid job? and if so can a person that has been doing the job for more than 30 days keep it regardless of seniority?
You pose two questions. 1. Is any job position that makes more money a bid job. Only if that particular type of job is covered under the bid procedures. 2. Can a person that has been doing the job for more than 30 days keep it, regardless of seniority. It depends if it's a new job, or an existing job, and it depends on the language of your local supplemental agreement. It also depends on how the job becomes available.
Scenario: Full time driver retires from his bid job. The company can fill that job with a new hire, until the next annual bid. They can, under some agreements, fill that position with a cover driver, until the next bid.
Post more about the situations you are talking about, and maybe you could get better answers than I have provided. You could also speak with your steward, I'm sure he could answer it better than I could, seeing how he would know your supplemental agreement better than I do.