Scar-Vet on Cold One: Savage Charge question

[foolsama]

COMMAND ABILITY

Savage Charge: If a Scar-Veteran uses this ability, then you can re-roll charge rolls and hit rolls of 1 for SAURUS units within 8". In addition, until your next hero phase this model and any Saurus Knights within 8" make an additional attack with the Cold Ones' Vicious Bites.

Given the above (word for word what's on the warscroll, same formatting), what, if any abilities travel with the units? If the command ability is used in the hero phase, and then a unit of Saurus Warriors moves 10" away from the Scar-Veteran, do they still get re-rolls? If a unit of Saurus Knights move away, do they still get the extra attack?

EDIT: I'm looking for word smithing arguments for Rules as Written - I have zero interest in 'intent'.

[heywoah_twitch]

Rules as written leaving 8" would remove all effects of his buff immediately.

As to the 'until your next hero phase' part, it is describing the area of Savage Charge's effect, or in other words the conditional requirement to receive the effect (this model and any Saurus Knights within 8") and not targets that are affected with a traveling buff, like for instance Mystic Shield, which are worded distinctly.