When the non-UEB text is displayed on one or more lines separate from the UEB text, the opening and closing non-UEB passage indicators may each be placed on a line by itself.

Except in the previous instance, place non-UEB indicators at the exact point of change from UEB to non-UEB and back, unspaced from the symbols-sequence(s) which they precede or enclose. That is, do not insert spaces which are not already present in the text.

Other forms of English braille use special codes to represent mathematics and science, computer notation and other technical or specialised subjects.

When a non-UEB code provides a symbol for switching out of that code, use that symbol in preference to the non-UEB word terminator or the closing non-UEB passage indicator.

To switch from UEB to music braille when an indicator is necessary, leave a space and place the opening music indicator immediately before the musical notation.

Follow print spacing in any technical notation where spacing is significant. If unsure of its significance, follow the print spacing as long as the presence or absence of spaces is clear. In cases where print spacing is indeterminate or known not to be significant, spacing should be used to reflect the structure of the expression or equation.

Note: In most common mathematics including algebra, operation signs should be unspaced on both sides but comparison signs should be spaced.

Refer to: Guidelines for Technical Material, Part 1, General Principles, for more advice on the spacing of technical material.

Follow the provisions of New International Manual of Braille Music Notation for returning to UEB from music braille.

When technical material is transcribed according to the provisions of The Nemeth Braille Code for Mathematics and Science Notation within UEB text, the following sections provide for switching between UEB and Nemeth Code.

A simple numeric fraction is one whose numerator and denominator contain only digits, decimal points, commas or separator spaces and whose fraction line in print is drawn between the two vertically (or nearly vertically) arranged numbers. In such a case a numeric fraction line symbol is used between the numerator and denominator and continues the numeric mode.

Place the opening Nemeth Code indicator followed by space before the sequence to which it applies. Its effect is terminated by the Nemeth Code terminator preceded by space. 

Note: The spaces required with the indicator and terminator do not represent spaces in print.