With the rise of digital non-linear editing systems, the award name was changed to Best Editing in 1999:
See also:
... Young 1983 Glenn Gould 1986 Gordon Lightfoot 1987 The Guess Who[?] 1989 The Band 1990 Maureen Forrester[?] 1991 Leonard Cohen 1992 Ian and Sylvia[?] 1993 ...