In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

The Multi Crew Coordination or Multi Crew Co-operation ( MCC ) is an allowance , an additional training at the commercial pilot licence required in order to fly within a crew , that means in a multi-pilot aircraft with the aircrew consisting of at least two members .
The Multi Crew Coordination ( MCC ) is a training in addition to the commercial pilot licence required to fly with a crew , in a more than one pilot aircraft .

The Emir has the exclusive power to appoint and remove the prime minister and cabinet ministers who , together , constitute the Council of Ministers , which is the supreme executive authority in the country .
The Emir is the only one who can appoint and remove the prime minister and cabinet ministers .

Trickle-down economics , also called trickle-down theory , refers to the economic proposition that taxes on businesses and the wealthy in society should be reduced as a means to stimulate business investment in the short term and benefit society at large in the long term .

Trickle-down economics is an economic theory : if you tax less the businesses and the wealthy , then that should make it easier for them to invest and create businesses .