Soon after, Alaska became a state, and in 1960 the Sheenjek River basin was included in a presidential executive order.

NPR: Mardy Murie, Alaska's Passionate Protector

Ironically it was back in 1976 when George Bush senior was CIA Director that assassinations were forbidden by presidential executive order.

BBC

Federal agencies are required by presidential executive order to prepare a regulatory impact assessment in support of any economically significant regulatory action, an important component of which is a benefit-cost analysis.

FORBES: Magazine Article