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The president could probably not avoid this restriction by choosing people willing to serve without pay , because the Anti-Deficiency Act prohibits voluntary service to the government .
 law: the Anti-Deficiency Act
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 law: the Anti-Deficiency Act