which one is correct:
1. Ex post facto sanction was accorded to Mr. A for attending the meeting
2. Ex post facto sanction was accorded to Mr. A for having attended the meeting
3.Ex post facto sanction was accorded to Mr. A for attended the meeting
2. Ex post facto sanction was accorded to Mr. A for having attended the meeting.
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2. Ex post facto sanction was accorded to Mr. A for having attended the meeting.
ex post facto refers to some past event, so choose #1.
#2 does not refer to a past event. It refers more to an ongoing state.
#3 is incorrect grammar.
was accorded to is not a suitable verb here, as it suggests that something good was given to Mr A. You could say eg was applied to.
Clive