when did the FCC relax COL rules?

[Kevin Vahey]

Just curious when the FCC relaxed the COL rules for television.

40 years ago the defunct WXPO had to orginate 60 percent of local
programming from the transitter studio in Windham as the FCC denied
the request to add Lowell as a co-COL.

Today stations are allowed to have remote master control centers
hundreds of miles away. Fox example WPRI in Providence is controlled
by WWLP in Springfield.

Local syndicated programming for Providence sits on video servers in
Chicopee as do commercials.

There was a case a few years back where a major station in Buffalo was
off the air for a number of hours as the master control in
Indianapolis was unaware of it.

So when exactly did the FCC allow this?