Following the Portuguese usage for blazoning flags, or and argent are not used, being respectively replaced by yellow and white. Flags with a gyronny field are reserved for cities. Regarding the other two designs, although not a mandatory rule, recent practice has been to give quarterly flags to towns and flags with a single tincture to the rest of the freguesias. There are two shapes of flags, according to the intended use. The first type is the standard, to be used as parade flag. This is square with a side of 1 meter, made of silk, with the coat of arms represented in the center of its field. Standards are bordered by a cord in the dominant metal and color, ending in tassels and tied to a golden staff and spear. The other type are the flags to be flown from fixed staffs, flagpoles or halyards. These are rectangular, with a proportion of 2:5 and with no fixed dimensions. The flags of this type may include the coat of arms or not (with exception of flags with a single tincture, which always include it). The seals are always round and consist of a central circle surrounded by a bordure. The central circle contains the charges of the coat of arms, but without the tinctures. The bordure contains the name of the body of government of the municipality or freguesia. Regional heraldry The regional heraldry refers to the coat of arms used by the regional level (above municipal level) self-governing entities of Portugal. Although provinces, autonomous districts and other self-governing entities existed in the past, at present the only such entities these type are the autonomous regions of Azores and Madeira. In contrast with the municipal heraldry, there is no regional heraldry tradition in Portugal. The local government heraldry law of 1991 also defines the standards for the coats of arms and flags of the administrative regions. These are envisioned in the Portuguese Constitution as regional local government entities of mainland Portugal, but were never created, so their heraldry was also never implemented. The administrative regions would also have the right to bear arms, seal and flag, with similar features to those of the municipalities. The arms would be topped by a special mural crown similar to that of the city of Lisbon, but with a quina alternating with each tower. The flags would be gyronny of sixteen pieces. In contrast,