education provider 必须遵守 National code 比如说 contacting and counselling l. The attendance calculations and warning letters 是不是正确，否则就是exceptional circumstance out of student’s control.签证就不能被取消。
tIn Liu v MIMIA  FCAFC 123; (2005) 146 FCR 228. Honours’ reasoning would suggest that a s.20 notice would not be valid if sent in respect of a student who was not an accepted student at the time of the breach of condition 8202
The Full Federal Court in Maan v MIAC  FCAFC 150 said that, in relation to the version of condition 8202(3) applicable in this case, being the version in operation from 1 July 2007, it is the certification by the education provider which constitutes the breach by the student of the visa.
In Uddin v MIMIA  FMCA 841, the Federal Magistrates Court held that the automatic visa cancellation process under s.137J(2) of the Act does not activate unless a notice which complies with the mandatory requirements of s.20 of the ESOS Act is sent to the student.j基本上说的是如果学生在被发S20 notice 的时候已经转学了。（参考PRISMS时候学生状态）。这个学校发的S20是无效的。就不能激活移民法S137的cancellation 程序。
但是S116 现在又是另外一种情况。(Luo v MIAC & Anor  FMCA 160 and Karki v MIAC & Anor  FMCA 369). 6. The reason for this is that the issuing of a s.20 notice is not a precondition for cancellation under s.116(1)(b). The power to cancel a visa under s.116(1)(b) for breach of condition 8202 is engaged when there is a certification by the education provider of the kind described in condition 8202(3). The only question arising under s.116(1)(b) and (3) and r.2.43(2)(b) is whether there has been non-compliance with visa condition 8202. Condition 8202(3) is breached if the provider has certified the holder, for a registered course undertaken by the holder, as not achieving satisfactory course progress for s.19 of the ESOS Act and standard 10 of the National Code.