How often does a carpet need to be replaced by the landlord in GEORGIA?

My apartment complex is trying to charge me for new carpet for my apartment although we've been there for two years and I think the stains are "normal wear and tear". It's going to be about $900 for the new carpet but I believe I heard they have to change the carpet every two years. Please cite... show more My apartment complex is trying to charge me for new carpet for my apartment although we've been there for two years and I think the stains are "normal wear and tear". It's going to be about $900 for the new carpet but I believe I heard they have to change the carpet every two years. Please cite sources if possible.
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