J.T.
That comes under the title of training and proficiency which comes down to sim practice .. if you are fortunate enough to have an employer who puts dollars into extra training in the box.
I believe most U.S. Part 121 carriers' Performance and Engineering departments use the dimensions in AC 120-91 (Post #4), rather than the lateral limits of 121.189.
I know that APG uses the lateral areas of AC 120-91.