After this short film became the first to win Oscars for both Documentary/short subject and Short Subject/live action film, the Academy changed the rules the following year. Beginning with the 1972 awards, a short film could be considered for nomination in either category, but not both. From 1978-1993, all documentaries were ineligible for consideration in the Short Films category (Short Subjects was renamed Short Films in the 1974 awards year). Beginning with the 1994 awards, an animated documentary short subject may be submitted in either the animated short film category or the documentary short subject category, but not both.
