DC disability exclusion

[JudyZ13]

Fixes #3969

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.15%. Comparing base (770adf7) to head (258b623).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4075   +/-   ##
=======================================
  Coverage   99.15%   99.15%           
=======================================
  Files        2401     2402    +1     
  Lines       34754    34773   +19     
  Branches      164      164           
=======================================
+ Hits        34461    34480   +19     
  Misses        261      261           
  Partials       32       32           

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[MaxGhenis]

can we wrap this up?

[hua7450]

Superseded by #4730