The academy is now "willing" to consider a new rule that would require actors to log a certain amount of screen time in order to be eligible for an Emmy nomination, says academy spokeswoman Pam Golum.
Golum says that no such rule presently exists - and she defended Burstyn's nomination for her blink-and-you-missed-it blip in HBO's "Mrs. Harris."
"Based on the popular vote, this is a legitimate nomination," Golum told the Associated Press.
All it takes to be considered for an Emmy nomination is a $200 entrance fee.
Burstyn's name was submitted by someone at the "Mrs. Harris" production company, an HBO insider told the AP.
Burstyn, who was nominated for Outstanding Supporting Actress in a Miniseries or Movie, won an Oscar for her starring role in the 1974 movie "Alice Doesn't Live Here Anymore."