A diary entry suggests that a year after Elizabeth's death Johnson was seeking a new wife "without any derogation from dear Tetty's memory".
Three of the six main union confederations signed in 2013 a central agreement in France, subsequently enacted as law, introducing the possibility of derogation from sectoral standards for companies in economic difficulty subject to commitments to refrain from implementing redundancies.
Not all the CSFS holdings were culled and tested; some farmers, for example, with rare breeds where replacements would be difficult to find, applied successfully for derogation from culling for up to five years.
Between 2007 and 2015, these active ingredients were listed as "highly hazardous" by the Forest Stewardship Council (FSC) and could not be used on FSC-certified forest land without derogation (Forest Stewardship Council 2007, 2015).
"Every grant to the president, including those relating to foreign affairs, was in effect a derogation from Congressional power, eked out slowly, reluctantly, and not without limitations and safeguards," Professor Henkin wrote, in a typically lucid and graceful passage.
It was not enough that they had spent years in detention without charge or trial; the US authorities wanted to prove that this derogation from the Magna Carta was justified because they were very dangerous people.
Religious bodies, some recalled, had won a derogation from equality legislation so they could carry on using their own criteria to hire clerics.
Britain could seek a derogation from the European convention on grounds of national security, though this would be a profoundly unpopular option.
Will the government seek a derogation from article 12? Miller says she will announce the detail in relation to the plans tomorrow.
But Mr Clarke hopes they will pass: if necessary, he says, he will seek a new derogation from the clause in the European Convention on Human Rights that guarantees a right to liberty.
"If it is to speed up the pace of change, then the process of passing a law for positive discrimination would itself be lengthy, requiring us to seek a derogation from the EU with no guarantee of success".
