ETA Questions: Interpretation of the "Changes in Level Are Not Permitted" Requirements

1) Where the Standard specifically refers to 303, such as 403.4 changes in level for walking surfaces:

Here it is clear that changes in level that comply with either the ¼" maximum vertical rise, the ½" maximum beveled rise with a slope not steeper than 1:2, or changes in level that are ramped in compliance with 405 or 406 are acceptable where changes in level are permitted. Other examples include: 404.2.5, 608.7, 302.2, 407.4.2, and 1003.2.1 Exception 8.