The organisations argue that preventing an entire group of fans from attending a match can have far-reaching consequences for football culture.
Lecce were fined €10,000 after their supporters threw two smoke bombs onto the pitch.
The suspensions cover a range of disciplinary offences, including yellow-card accumulation, red cards and a late-kickoff violation.
The decisions follow incidents during the Celtic and Rangers quarter-final at Ibrox on March 8.
Liverpool welcome Nottingham Forest to Anfield this weekend.
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