can anyone explain in simple terms PLEASE

1:The parties have had a marriage ceremony in disregard of certain requirements as to the formation of the marriage?

2: The Petitioner will be barred from obtaining a decree of nullity if the Respondent can satisfy the Court that the Petitioner knew that the marriage could be avoided but conducted him or herself in such a way as for the Respondent to reasonably believe that they would not seek to do so. The Petitioner may also be barred from obtaining a decree of nullity if it would be unjust to the Respondent to do so.

Thank you

Whats the context, who sent this a solicitor or court (reads like court), it seems to be warning that the Decree Absolute may be refused though the reason seems very odd.

The more back ground you can give the better.