"[The guidelines] recognises a need - it's sad to think the need was there."
Young people made "poor choices" at times with substances at school but the most concerning issue was cyber bullying and he welcomed any initiatives to combat it.
Secondary Principals' Association ex-president Patrick Walsh said education representatives were meeting the Education Ministry next week to discuss how the rules would affect electronic devices which could be used for cyber bullying.
At present teachers could confiscate tablets or smartphones, but could not search the contents.
Schools had a small window of opportunity to delete malicious or intimate images of students, before images were uploaded to the internet by an offending student.
Mr Walsh was keen to see the ministry work with internet providers and internet safety body NetSafe to improve students' safety from cyber bullying.
Current association president Tom Parsons said although some principals would not be happy with the new search rules and guidelines, the legislation gave schools clarity on what they were legally permitted to do.
Some principals had to search students on an almost daily basis, whereas others only needed to do so occasionally, so it was difficult to issue a "blanket guideline".
APNZ