Literature, being a form of art, is governed by no rules.
Hmm. Yes, and no, Ou Be. While some publishers ARE, in fact, willing to allow an author his/her head in grammar if the work is such that standard rules can't apply and retain the novelty of the work, most American publishers do hold authors to grammatical standards set out in a number of volumes.
Since you're in Scotland, third man girl, I don't know if those of us in America can help much. But novella is right that most major New York publishers use the Chicago Manual of Style. It's been stated in the volume that the primary difference between American and British styles of punctuation is that the "American system governs the placement of punctuation in fiction. The British style is strongly advocated by some American language experts when using specialized material. In linguistic and philosophical works, specialized terms are regularly puntuated by British way. But in defense of nearly a century and a half of the American style, it may be said that it seems to have been working fairly well and has not resulted in serious miscommunication."
Here's the blurb for ellipses (14th ed., at 10.39).
"Authors and editors are not always consistent in the way they use ellipses and dashes in interrupted speech, but an attempt should be made to establish a distinction. Ellipsis points suggest faltering or fragmented speech accompanied by confusion, insecurity, distress or uncertainty, and they should be reserved for that purpose. The dash, on the other hand, suggests some decisiveness and should be reserved for interruptions by action or another speaker, abrupt changes in thought, or impatient fractures of grammar.
For example: "I . . . I . . . that is, we . . . yes,
we have made an awful blunder!"
"The binoculars . . . where in the devil did I put them?"
"The ship . . . oh my God! . . . it's sinking!" cried Henrietta.
The ellipsis points are printed on the line like periods, not above it like multiplication dots in mathematics. They are separated from each other and from the text and any contiguous punctuation by 3-to-em spaces (or a space between each point). If other punctuation, such as a period, exclamation point or a question mark, occurs at the end of the fragment, it is retained before the three points, such as:
"But . . . how? . . . ," said Tom."
Hope that helps!
Cathy