Service Tax registration amendment expands the referenced sub rules to include an additional sub rule, widening the rule's scope. Amends the Service Tax (Registration of Special Category of Persons) Rules, 2005 by substituting in rule 3(3) the reference to sub rules (2) to (7) with sub rules (2) to (8), formalised by a notification that sets the amendment's short title and commencement date under powers conferred by the Finance Act.