Meanings of imposed obligation in English

What debt should be easier to forgive than a self- imposed obligation?

Tennyson accepted the laurel, and with it a self- imposed obligation to make occasional acknowledgments for the gift.

For ten years now he'd lived with his self- imposed obligation to Amber-Lee, whom he now knew to be Jilly Baker.

The self- imposed obligation on responsible newspapers not to offend unnecessarily or gratuitously while safeguarding provocative and challenging journalism requires difficult judgment calls.

Let it be an imposed obligation, therefore, that you retain these portions unchanged as a test and a proof to all who may read.