Are there multiple ways to handle a lease violation?

[Wade Penner]

I have a tenant with indoor furniture outside, which violates the lease.  I sent them an email and asked them to remove the furniture.  However, in the case that it isn't removed I wanted to get clarification on how to address it.

I live in Oregon, and the rental forms company I use has a lease violation form and a noncompliance form.  I've looked in to this online and some sites/blogs recommend a 30 day notice with eviction following non-compliance issues, while others allude to a warning, and then a $50 fee if it happens again or isn't addressed.

Is it either or, or does it depend on the seriousness of the violation?   I realize the specifics are most likely state-dependent, however those two options are fairly different to begin with.

Thanks!