Yep. You can add as many as you'd like. That's where the "cascade" comes in. Firstly, all rules are superseded by later rules, or more specific rules. Then Linked rules are superseded by embedded rules which are superseded by inline styles.
RULES FROM European Mechanical Handling Confederation.
The rules of a language is called its syntax.
There are really no rules, just you can't place an attribution for an image into a text element
XML has no rules like html in regards to tags and naming tags, you write your own xml tags.
The Rules was created on 1995-02-14.
Against the Rules was created in 2009.
Yesterday Rules was created in 2004.
No Rules - film - was created in 2005.
Unconsciousness Rules was created in 1981.
Brooklyn Rules was created in 2007.
Hart's Rules was created in 1893.
Defying the Rules was created in 1000.
Rules of Love was created in 2010.
The Rules of Play was created in 2007.
Skinner's Rules was created in 1993.
Rules for Radicals was created in 1971.