高中的時候，應該是準時上學的規定。遲到的懲罰十分無牙（無聊），只算是五分之一的缺課一天。

应该是高中的時候，准时到校的規定。迟到十分钟的，或者缺课五分之一的都算旷课。

高中的時候，規定要準時上課。遲到的懲罰十分嚴格，缺課五分之一就算是缺課一天。

我覺得應該是高中的時候學校關於準時上學的規定。學校對於遲到的懲罰十分嚴厲，遲到了就算你當天缺了五分之一的課。

高中的時候，應該是準時上學的規定。遲到的懲罰十分無牙，只算是五分之一的缺課一天。First, please review the question itself again. The question literally means "at your school the most meaningless one of constrictions is what", which means "What's the most meaningless rule in your school constrictions?" Now check your answer again. Your answer to this question seems to be very ambiguous. You are supposed to give your opinion in a general way or personal way. For instance, first 'in my opinion 我个人觉得" and then give the reasons why you think it is the most meaningless and try to illustrate your explanations clearly. If you wanted to make a comparison, you had better clarify what the comparative arguments that you meant to mention in your writing. There are two things that may help with your Chinese writing for this question. First, try to make a list about your arguments. Second, review the grammar points about Time and Proportion. The best of luck to you! Keep it up!