Explanation of Wording in This Code

Explanation of Wording in This Code

1　Words used for different degrees of strictness are explained as follows in order to mark the differences in executing the requirements in this code:

1）Words denoting a very strict or mandatory requirement:

"Must"is used for affirmation，"must not"for negation.

2）Words denoting a strict requirement under normal conditions:

"Shall"is used for affirmation，"shall not"for negation.(https://www.daowen.com)

3）Words denoting a permission of a slight choice or an indication of the most suitable choice when conditions permit:

"Should"is used for affirmation，"should not"for negation.

4）"May"is used to express the option available，sometimes with the conditional permit.

2"Shall comply with…"or"Shall meet the requirements of…"is used in this code to indicate that it is necessary to comply with the requirements stipulated in other relative standards and codes.