Yet the process to privatise and, by extension, uibanise ejidal land is cumbersome, requiring: i) the measurement and allocation of parcels to each ejidatario, ii) the conversion of parcel rights into private property rights, requiring the approval of a majority of the ejidatarios-, iii) confirmation that nobody with a legal right of preference (e.g. family member of an ejidatario) objects to the transfer or wishes to purchase the land, and iv) sale of land. Given the extent of ejido land in Mexico, the complexities of its urbanisation process represent a significant obstacle to legal and well-planned private development, encouraging circumvention of the law, these complexities have also made the process vulnerable to corruption. This has permitted the appropriation of land by real estate developers and the illegal construction of housing in land that may not be suitable for construction.