Tier 4 Visa Requirements Guild Change No ratings yet. Log in to rate. For unpaid part-time elected roles, the rules on Tier 4 visas do not apply. Home Office rules do not permit you to study a Tier 4 course on a part-time basis. For Sabbatical roles, an interruption or extension is possible, and the University of Exeter would be your Tier 4 sponsor. The Students' Guild is not permitted to act as Tier 4 Visa sponsor under the Home Office rules. The UK Council for International Student Affairs (UKCISA) has additional information. Back