19.48. The quality criteria as described in the present chapter also apply to statistics on the international supply of services by mode.
 For example, such an approach is adopted by Eurostat (see European Commission regulation No. 555/2012 annex 1, table 3); http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2012:166:0022:0066:EN:PDF. Also see Balance of Payments Vademecum, chap. 5.
 United Kingdom, Government Statistical Service, National Statistician’s Guidance, Quality, Methods and Harmonization (2009). Available from www.statisticsauthority.gov.uk/national-statistician/ns-reports--reviews-and-guidance/national-statistician-s-guidance.