Use code switching indicators when the non-UEB braille would be ambiguous and when the nature and extent of the non-UEB text cannot be determined by the context or format.

Other forms of English braille use the following composition signs (indicators) which are not used in UEB:

non-Latin (non-Roman) letter indicator

accent sign (nonspecific)

print symbol indicator

italic sign (for a word)

double italic sign (for a passage)

When code switching indicators with identifiers are used, explain them either on a special symbols page or in a transcriber's note positioned before the affected material. [See 14.3.3.]

Place the non-UEB word indicator immediately preceding the symbols-sequence to which it applies. Its effect is terminated by the next space or by the next non-UEB word terminator. 

Other forms of English braille use the following general symbols which are not used in UEB:

pound sign (pound sterling)

paragraph sign

section sign

dollar sign

asterisk

end of foot

caesura

short or unstressed syllable

long or stressed syllable

Use the non-UEB passage indicators when there are three or more symbols-sequences in the non-UEB braille code. The effect of a nonUEB passage indicator continues until the closing non-UEB passage indicator.

When more than one non-UEB braille code is used in a particular text and it is not obvious which one is intended, modify the opening nonUEB passage indicator by augmenting it with an identifier. Before the dot 3, insert a short, mnemonic sequence of letters (no contractions) which is unique within the text. The transcriber determines the abbreviations used. Refer to ISO Standard 639-3 (on the website of SIL International, http://www-01.sil.org/ISO639-3/codes.asp) for a list of two- and three-letter designations for languages.

Identifiers are not used with the non-UEB word indicator. If an identifier is required, use the opening and closing non-UEB passage indicators, even if it is only for one symbols-sequence.

When more than one non-UEB braille code is used in a text, use a non-UEB indicator without an identifier only when its meaning is obvious or when it refers to the same code as the next previous nonUEB passage within the paragraph.

Close any non-UEB passage before opening another non-UEB passage. In other words, return to UEB first even if another non-UEB passage will start immediately.