Modvat credit eligibility widened as 'exclusively' replaced by 'primarily', broadening claims for yarn and fibre inputs. Amendment under sub-rule (2) of rule 57A of the Central Excise Rules replaces 'exclusively' with 'primarily' in paragraph 7B of Notification No. 29/96-C.E. (N.T.), thereby broadening the qualifying standard for Modvat credit on yarn and fibres claimed on a deemed basis from sole use to predominant use.