What is the minimum altitude requirement for IFR flight in the 0-179 degree range?

For IFR flight in the 0-179 degree range, the minimum altitude requirement is indeed established based on odd and even thousands of feet. Specifically, altitudes are assigned in increments of 500 feet above the odd thousands. This means that if you are flying in that directional range, your altitude would be at least 3,500 feet, 5,500 feet, 7,500 feet, and so forth, which corresponds to the odd thousands plus 500 feet.

The regulation aims to ensure vertical separation between aircraft flying in opposite directions within the controlled airspace, enhancing safety and reducing the risk of mid-air collisions. This structured altitude assignment is a critical aspect of instrument flight regulations and helps maintain organized and efficient air traffic operations.