The ad’s own words
Online applications only; manual applications shall not be entertained. Online application requires initial registration through SPSC official website, www.spsc.gov.pk. After fulfilling formalities, candidates can apply through “Available Jobs” feature. Generate a PSID before making the Challan payment of Rs. 500/- through any online payment channel by selecting the 1 Bill invoice/service option. For all categories of one post, one Challan is acceptable. The online application feature is available round the clock, except on closing date up to 05:00 P.M. (office hours). Candidates serving in Government and Semi Government Organizations shall apply through proper channel.