The flag of Spain, as it is defined in the Spanish Constitution of 1978, is three horizontal stripes: red, yellow and red, the yellow stripe being double the width of each red stripe. Usually the flag is charged with the Spanish coat of arms in the left half of the yellow stripe, as it is compulsory for all the spanish institutions and military forces according to the law.
The flag in its current form was adopted on December 19, 1981[1], when it replaced the interim version which, in turn, replaced the official flag of Francoist Spain. The coat of arms was the only changing element in all three of them. [
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