Looking on the internet deeply has found these results:

applied to is the most popular phrase on the web.

applied on 117,800,000 results on the web	applied to 1294,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
paints and coatings containing DBT compounds as catalysts when applied on articles, discriminatory basis. Supplementary marks may be applied on a temporary or permanent basis. European Community law is applied on a non Community law is applied on a non discriminatory basis. discriminatory basis. 5. This reference rate shall be applied on a composite basis throughout the period referred to in paragraph 3. European Community law is applied on a non	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

applied on

117,800,000 results on the web

applied to

1294,000,000 results on the web

More popular!

paints and coatings containing DBT compounds as catalysts when applied on articles,
discriminatory basis.
Supplementary marks may be applied on a temporary or permanent basis.
European Community law is applied on a non
Community law is applied on a non discriminatory basis.
discriminatory basis.
5. This reference rate shall be applied on a composite basis throughout the period referred to in paragraph 3.
European Community law is applied on a non

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.