Applicable from January 1, 2025
From the stated date, the visa appointments for non immigrant visa such as visitors visa, Business visa, conference visa, Student visa, Student exchange visa can be scheduled normally. However, if you want to reschedule the appointment, you will be allowed to reschedule only once.
In case, if you fail to visit the visa office at the second attempt, you will need to take entirely new appointment and again pay the visa fees. As per the US consulate website, this is done to give fare chance to every one and reduce the visa wait time.