अशक्तः कुत्सिते कर्मणि व्याधौ व्यसने वानुशयं लभेत परेण वा कारयितुम् ॥ कZ_०३.१४.०२ ॥
aśaktaḥ kutsite karmaṇi vyādhau vyasane vānuśayaṃ labheta pareṇa vā kārayitum
If unable (to perform)—because the work is disgraceful, or due to illness or calamity—he shall obtain relief (abatement/forgiveness) or may have it performed through another person.
Yes—incapacity, illness, calamity, and being asked to do disgraceful work justify relief or substitute performance.