Here's what I found on the internet:
Get an E-Lane sticker. You can get the form from any check post, just
ask the soldier standing and he will provide you a form for 20 RS. You
have to fill the form, instructions and conditions are on the backside.
And for one vehicle, you can get an E-lane sticker for 1500 Rs which
lasts one year.
Source: https://www.pakwheels.com/blog/e-lane-stickers-why-and-how-should-you-get-one/