you are free to apply to be a merit source if you believe your local need an active merit source. theymos may consider including you as merit source based on your judgement of sharing merits.
I don't know about that cause a year ago my fellow legendary countryman applying for merit source but sad to say didn't accepted. And I don't know also about this if low ranks applying for Merit Source got accepted. Anyways that's not the problems here we can Post in global section and get merit.
Based on these statistics:
https://bitcointalk.org/index.php?topic=5231446.0it seems to me that there is still enough merits available in your local part of the forum, for quality posts.
Of course, if you disagree with this statement and think you need a new local merit source, then why not apply for a merit source in person?
Theymos is a reasonable person and if you can prove with arguments that your local part of the forum lacks merits for quality posts, that will be corrected.
Only a person who has the support of the local community and a good reputation on the forum should apply for a merit source.