CREATE TABLE table_41553 ("Year" FLOAT, "Circuit" TEXT, "Winning drivers" TEXT, "Winning constructor" TEXT, "Regulations" TEXT, "Report" TEXT)

What regulations have carlos arzani as the winning driver?
SELECT "Regulations" FROM table_41553 WHERE "Winning drivers" = 'carlos arzani'
SELECT "Regulations" FROM "table_41553" WHERE "Winning drivers" = 'carlos arzani'