=== CUE END TIME RULES ===
1. The cue end time must be greater than start time
2. Should start with any characters in the range of U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9)
3. Can not have any characters other than
* U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9).
* one U+002E FULL STOP character (.).
* one U+003A COLON character (:) only if the hour is zero and not included, if not, two U+003A COLON character (:).
4. Optionally (required if hour is non-zero) include
* Hour - two or more characters in the range U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9)
5. Should include
* Minute - 2 characters in the range of U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9). Range 00 to 59.
* Second - 2 characters in the range of U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9). Range 00 to 59.
* Millisecond - 3 characters in the range of U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9). Range 000 to 999.
6. U+003A COLON character (:) should be used to separate
* Hours and Minute
* Minute and second
7. U+002E FULL STOP character (.) should be used between second and millisecond
