Until 10 February 2007, Spain continued to impose restrictions on Gibraltar's ability to expand and modernise its telecommunications infrastructure. These included a refusal to recognise Gibraltar's International Direct Dialling (IDD) code (+350) which restricted the expansion of the Gibraltar telephone numbering plan, and the prevention of roaming arrangements for Gibraltar GSM mobile phones in Spain and vice versa. Following the signing of the Córdoba Accord between the Governments of Gibraltar, the United Kingdom and Spain in September 2006, these restrictions were removed with effect from 10 February 2007.