●   Is there legislation governing the rental of housing by foreign nationals?

The "Rental Housing Market Development and Regulation Act" is available for download from the website of the Ministry of the Interior: https://www.land.moi.gov.tw/enhtml/enlawdet/29?elid=119 

●   Is there a rental housing model contract available for reference? 

There is a model contract available for download from the website of the Ministry of the Interior: https://www.land.moi.gov.tw/chhtml/content/89?mcid=4068
Sample Rental housing Contract-2020