Do not use the lower groupsign for "ea", "bb", "cc", "ff", or "gg" when the letters it represents precede the hyphen or fall at the beginning of the braille line in a word divided between braille lines. 

Place a modifier before the letter it modifies in braille, irrespective of whether it appears above, below or overlaying the letter(s) in print. Whenever a transcriber-defined modifier is used, give the print symbol it represents in a transcriber's note or on a symbols page.

If an indicator is required immediately before a modified letter, place the indicator before the modifier.

Modifiers on letters do not terminate capitalised word mode.

A modified letter may not form part of a contraction.

Note: In words such as théâtre where the contraction for the is not used, the contraction for th can be used.

If a single modifier applies to more than one letter, enclose the modified letters in braille grouping indicators. Grade 1 indicators are not required for the braille grouping indicators since the modifier can not be followed by a contraction.

Where a modifier is shown in print without an associated letter, as in a dictionary entry or in instructional material, follow print.

Refer to: Sections 3.6 and 3.25, General Symbols and Indicators, for the caret and the tilde (swung dash); and Section 7.1, punctuation, for the solidus (forward slash) when these are separate characters rather than modifiers.

Use the modifiers listed above only in foreign language words and phrases in English context intended primarily for leisure reading, in English words or in anglicised words and phrases.

Where a significant knowledge of a foreign language is presupposed or is being taught, use signs from the indigenous foreign language braille code.

Refer to: Section 13, Foreign Language, for more guidance.

Do not use the lower groupsign for "be", "con" or "dis" when the letters it represents precede the hyphen or fall at the beginning of the braille line in a word divided between braille lines. 

Retain the braille form of the lower wordsign for "enough" or "in" in conjunction with the dash even when divided from the dash by the end of the braille line. However, it is also necessary to follow the lower sign rule.