https://www.mindtools.com/pages/article/standing-up-for-your...

When Guilt Keeps You From Setting Boundaries | Psychology Today
https://www.psychologytoday.com/intl/.../when-guilt-keeps-yo...
May 8, 2017 - I am finally going to take a stand and begin to set boundaries in my relationships and that boundary setting starts with placing limits around you. ... They feel responsible for other people's feelings and are compelled to be a ...

New Theory on Leadership Management Science
https://books.google.hu/books?isbn=1909287474
Bingxin Wu - 2013 - ‎Business & Economics
... improve the quality of the individual, and enhance the sense of responsibility. ... The psychological qualities of leaders mean that they should have a good attitude. ... to the psychological self, which means wide-ranging psychological limits, ...

Leadership Traits
While the list of leadership traits can vary by whoever is drawing up the list, a recent study from Spain outlined behavioral traits that separated lower-level supervisors from higher-level supervisors. According to the researchers, the traits most commonly associated with great leadership include:

Intelligence and action-oriented judgment: Great leaders and smart and make choices that move the group forward.
Eagerness to accept responsibility: Strong leaders take on responsibility and don't pass the blame on to others. They stand by their success and take ownership of their mistakes.
https://www.verywellmind.com/what-is-the-trait-theory-of-lea...

Véleményem szerint az adott kontextusban a HATÁR angol megfelelője BOUNDARY. Az alábbi összefoglaló jól illusztrálja, mire vonatkoztatható a kifejezés pszichológiai értelemben.

http://www.guidetopsychology.com/boundaries.htm

Részlet:
"By definition, a boundary is anything that marks a limit. Psychological limits define personal dignity. When we say, “You just crossed a line,” we are speaking about a psychological limit that marks the distinction between behavior that does not cause emotional harm and behavior that causes emotional harm."

Alternatíva lehet még a "keeping boundaries" fordítás, lásd:
https://psychcentral.com/lib/keeping-good-boundaries-getting...

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Note added at 6 hrs (2019-03-14 17:50:06 GMT)
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Ha nagyon kell ragaszkodni a főnévi igenévhez, akkor a BOUNDARY MAINTENANCE is szóba jöhet, ld. magyar-angol szociológiai szótár:

határtartás - boundary maintenance
http://www.szociologia.hu/magyar-angol_szociologiai_szotar/i...

Ámbár szociológiai vonatkozásban "boundary maintenance: The ways in which societies (or social systems) maintain distinctions between themselves and others", ezért nem biztos, hogy angol nyelvű olvasónak ez lesz a legjobb variáns. Úgy érzem, a "maintaining boundaries" változat sokkal kifejezőbb.

There are many way to express the traits described in the given context, but this is what I consider most appropriate.