I am curious about that as well. The photo appears to have been taken on a RIP track or storage track (note the passenger car coupled behind). While that particular board is high enough up that it shouldn't pose a problem, I wouldn't be surprised if it were enough for an interchaning railroad to refuse interchange.
From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> on behalf of Bob Chaparro via groups.io <chiefbobbb@...>
Sent: Saturday, November 28, 2020 10:57 PM
To: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io>
Subject: Re: [RealSTMFC] Photo: SP Livestock Car 74207
A question from Paul Deis:
Would that car be bad ordered for missing board on side?