It was extended in 1985 and again in 1987 or 1988.I remember specifically because the one year I missed doe season because of finals in college and got to hunt that saturday.I remember that vividly because I took my brother's brand new 06 out in the freezing rain and he was ready to kill me.He was equally upset when I shot a doe with it and it didn't drop on the spot.I'm not positive,but I believe it was also extended in either 1992 or 1993.We got three feet of snow that doe season and got dumped on again that march.I beieve the extension was 2002.I know for a fact it happened at least twice if not three times since 1980.
BT is also correct about them realizing that they had no authority to extend the seasons several years later when they wanted to.I forget the details though and don't know if it was ever fixed.