EM and anesthesia have the same RRC requirements for critical care months (4 months over the course of the residency). Between electives and mandated ICU time, someone graduating from my program could have 7 months of dedicated ICU time, in addition to seeing critically ill people every day for 4 years and exclusively critically ill people for an entire year as a PGY 3. Other than intubations which anesthesia obviously does a lot more of, we have similar graduating requirements in terms of other core procedures (vascular access, pacing, etc). We also, like anesthesia, have a broad clinical exposure to surgery, medicine, pediatrics, neurology. We, like anesthesia, have a broad and early exposure to bedside sonography and some of our residents graduate with RDMS certification. 4 year programs also usually have a fair amount of elective time, which could be directed to covering any gaps the ABA could see to make EM residents eligible to do a 1 year track. You can mandate that elective time must be spent, say, on extra rotations on surgical services, or in the OR with anesthesia, or whatever gaps in EM education the ABA could identify.