Most workers know they are required to work an increasing number of days (for an increasing number of years) to advance from a given letter list to the next higher list. (This allows us to refer more experienced people first, and helps ensure newer people have the opportunity to learn from those with more experience and stronger skills.)
Or if they can prove that they have knowledge/skills/experience valuable to our profession, they can appeal their initial list placement.
BUT, did you also know everyone is required to pass a written test for each advancement from the E, D, and C Lists?
If you have not taken or cannot pass these tests, you will not be advanced even if you have worked the required number of days/years.
Testing is starting in November this year.
If you are on the C, D, or E list and have not tested, you should watch under the Education tab for when testing begins this year.