Here are two entry tickets from our visit to the Taj Mahal this week. The yellow one is mine and the orange one is Natalie's.
Hmmm, what is different?
Got it? Yep, the price of the tickets. The yellow one (mine) has the cost in the lower right hand corner - 20 rupees. Natalie's - 750 rupees.
I think the money I saved on my ticket by being a "Person of Indian Origin: (Married to an Indian citizen) was about the same as it cost me to become a PIO.