1.610 Gender

When consistent with the context, words in the masculine gender include the feminine and neuter gender.

1.620 May

The word "may" is permissive.

1.630 Plural

When consistent with the context, words in the plural include the singular.

1.640 Shall

The word "shall" is mandatory.

1.650 Singular

When consistent with the context, words in the singular number shall include the plural.

1.660 Tenses

When consistent with the context, words in the present tense include the future, and words in the future tense include the present tense.