Summary (continued)
              The rules for identifying the source of each type of income are as follows:
              
                - Where the services are performed determines the source of income from salaries and other compensation. (There is a special rule for military pay received by bona fide residents of Puerto Rico who are members of the U.S. Armed Forces.)
 
                - The residence of the payer determines the source of interest income
 
                - Social Security Benefits are U.S. source income by definition IRC 861.
 
                - For pension distributions attributable to contributions, the place where the services were performed that earned the pension determines the source of pension distributions
 
                - For investment earnings on pension contributions, the location of the pension trust determines the source of investment earnings on pension contributions
 
                - The location of the payer determines the source of dividend income
 
                - The seller's tax home determines the source of income from selling personal property
 
                - The place where title passes determines the source of income from selling purchased inventory
 
                - Income from selling inventory produced is allocated between U.S. and non-U.S. sources
 
                - The location of the property determines the income source from rent and natural resource royalties
 
                - The location where the property is used determines the income source from royalties for patents or similar properties
 
                - The residence of shareholder determines the source of capital gains distributions paid by US Regulated Investment Company (RIC)
 
                - Where taxpayer performed the underlying services generally determines the source of unemployment compensations