Publishing Unity Application on Windows Phone Store

I have same content certification issue with my game.

Because the market-specific age ratings are optional in most markets, though there are four markets where the age rating is required to publish an app/game: Brazil, Korea, Russia and Taiwan.

Using following steps got certification for each market where a rating is required:

1. Game ratings in Brazil
   Obtain a ESRB game rating using the online form-
   link-https://autoratingtool.esrb.org/ARTclient/Windows.aspx

2. Game ratings in Russia
   obtain the rating-
   link-http://apps.pegi.eu/

3. Game ratings in South Korea
   Korea requires all games to be rated using the GRAC system.
   link-http://www.grb.or.kr/Institution/EtcForm01.aspx

4. Game ratings in Taiwan
   register as a developer with CSRR (typically takes a few days) and then register your game with CSRR through their website.
   link-http://www.gamerating.org.tw/company_login.php

At last after you have your ratings and certificates, and have added them to the app submission.

I've published a social app for Windows Store. I've just set "16+" for all countries (because according to descriptions in Windows Store my app should be 16+), and my app is available in Russia without special rating assignment.I'm sure that you can do the same.