a) 9999 for persons who have no income;
b) the last month's income for those who earn only fixed income (salaries and wages under contract, including those of military personnel, etc.).
c) the average income of the last twelve months for those who receive variable income (liberal professionals' fees, sale and brokerage commissions, payment for services rendered, etc.).
d) the fixed income from the last month, plus the average income for the last twelve months on the variable part, when the total income is comprised of a fixed and a variable part;
e) the average of the monthly amounts received from donations regularly received, rentals, sums received by executives, etc.

a) earnings resulting from the sale of property (real estate, livestock or furniture), but computing the difference between purchase price and sale price (operational profit) in the case of persons who live on such undertakings (real-estate brokers and salespersons of automobiles, used objects, etc.);

b) loans obtained from banks, pension fund institutions, or private parties;
c) inheritances received (not including sums earned from the use of property);
d) income from the redemption of insurance policies (life, accident, etc.) and from capitalization, but also calculating amounts received periodically from lifelong insurance policies;
e) winnings from lotteries and other games of chance (except by professional players).