of, for, or constituting discipline; enforcing or administering discipline: disciplinary action.

1575–85; discipline + -ary

nondisciplinary, adjective
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World English Dictionary
disciplinary or disciplinarian (ˈdɪsɪˌplɪnərɪ)
1.  of, promoting, or used for discipline; corrective
2.  relating to a branch of learning: criticism that crosses disciplinary boundaries
disciplinarian or disciplinarian

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1590s, from M.L. disciplinarius, from L. disciplina (see discipline).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
They were subjected to certain disciplinary regulations.
More depends on the traditions and the administrative, disciplinary, and social
  policies of the school.
We must make it clear that those kinds of actions will not be tolerated and
  will be met with meaningful disciplinary action.
The agreement also streamlines the disciplinary process for teachers facing
  such charges.
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