Which order addresses cautions on handling the National Ensign?

The order that addresses cautions on handling the National Ensign is the Executive Order of President Taft, which was issued on October 29, 1912. This executive order provided specific guidelines regarding the respectful treatment of the National Ensign, which is the flag of the United States. It emphasized the importance of the flag as a symbol of the nation and outlined appropriate conduct when displaying and handling it, including how to fold it and when it should be flown at half-staff. This order played a crucial role in establishing a standard for the respectful treatment of the flag that is adhered to even today.

The other options do not specifically address the handling of the National Ensign or provide guidelines related to it, making them less relevant in this context.