The agitation against the Himachal Pradesh Government's entry tax on out-of-state vehicles escalated on Wednesday after Nihang Sikhs imposed a symbolic "Khalsa tax" on Himachal-registered vehicles entering Punjab via the Kiratpur Sahib-Manali highway. The tax was collected for one hour, from 11.30 am to 12.30 pm, as a protest against Himachal's entry levy.