ATMA employs a strict sequential navigation rule. The 180-minute exam is divided into six 30-minute sections. Once you start a section, you must stay on it for the full 30 minutes. You cannot skip to the next section early, nor can you return to a previous section once its time has lapsed. The 'Next' button only becomes active after the 30-minute timer for the current section hits zero, at which point the system automatically locks the current section and opens the next.