a. Passes can be obtained free of cost at Auroville's visitor centre after watching a short introductory video.
b. Passes issue times are from 9 am to 4 pm from Mon to Sat. And 9 am to 1 pm on Sunday.
c. There are shuttle services available to reach matrimandir from visitors centre for those who have difficulty in walking.
Entering the Matrimandir is little complicated. And needs getting prior tickets (free of cost) one day before at least.
2. How to enter Matrimandir meditation area?
You need to obtain passes previous day to enter the Matrimandir.
A day before :
a. You have to visit Matrimandir information centre one day before (except Tuesday) from 10 am to 11 am and 2 pm to 3 pm
b. You need to watch a introductory video called "Matrimandir" which will be shown at the info centre itself
c. The tickets are given for the next day, remember there is no entrance fee for the Matrimandir. Its free of cost but its mandatory to visit in person a day before and reserve the seat.
Visit day :
d. Once you get the free tickets to enter Matrimandir, you have to visit Matrimandir on the next day.
e. You should be present at the info centre by 9 am, last entry allowed is at 9.45 am.
f. The timing to the meditation centre is from 9.35 am to 10.05 am for inner chamber and 9.30 am to 10.45 am for the petal meditation room.
g. You cannot carry mobiles and cameras into the meditation center, make sure to deposit them in the deposit counter.
h. Meditation center is closed on Tuesday.
You can find the complete details about the steps to enter Matrimandir in Auroville's official website. Make sure you read it thoroughly if planning to enter the Matrimandir meditation centre.
Feel free to ask any doubts. You can read my complete trip of Pondicherry on my blog.