a) In these Rules unless the context required otherwise:

1. 1) Words imparting the singular include the plural;
2. 2) Words imparting the plural include the singular;
3. 3) Words imparting the masculine gender include the feminine.

b) In these Rules, the word:

1. 1) "Shall" is used in an imperative sense;
2. 2) "Must" is used in an imperative sense;
3. 3) "Should" is used in a recommendatory sense;
4. 4) "May" is used in a permissive sense to state authority or permission to do the act described and the words "no person may * * * " or "a person may not * * * " means that no person is required, authorized or permitted to do the act described; and
5. 5) "Includes" is used as a word of inclusion not limitation.