Character Creation Starting Skill Rank Maximum

I am looking for some rules clarification on character creation. On this third party website it suggests that starting skill ranks cannot be higher than 3. I am also seeing this reflected in the character builder site on the homebrew list Google Doc. However, I cannot find this reflected in any of the rule books. I own every book on Alchemy and cannot seem to locate anything suggesting a skill rank maximum. Could somebody direct me to where this is located?