Add spaces: TheCBCDG'smissionistoinvestigateemergingthreatstothesecurityofbanknotesandtoproposesolutionsforimplementationbyissuingauthorities.

Answer: The CBCDG's mission is to investigate emerging threats to the security of banknotes and to propose solutions for implementation by issuing authorities.

Add spaces: ThebookwasbasedonalecturecoursehehadgivenatYaleUniversityintheUnitedStates.

Answer: The book was based on a lecture course he had given at Yale University in the United States.

Add spaces: Thisiswheretheextendedmaterialregisterhasitsfunction:silver-leaf,Poundandconcretearebucklingsonacommonculturalpole.

Answer:
This is where the extended material register has its function: silver-leaf, Pound and concrete are bucklings on a common cultural pole.