[size=14]Some additional information from the article The Russian Succession by Brian Purcell Horan:
The laws set forth a straightforward procedure to follow when a baby was born who qualified as a dynast. Under Articles 135 and 136, the parent immediately had to inform the emperor in writing of the child's name and birth date. The emperor then would order that the name of the child be entered in the Genealogical Book of the Imperial Family (maintained by the emperor's chancellery) and that the parents be informed that the child was included in the imperial family (Article 137). It was of course the emperor's decision as to whether a child satisfied the requirements for dynastic membership. Once he entered the child's name in the Genealogical Book, the issue was closed. Under Article 142, inclusion of a child's name in the Genealogical Book was proof of membership in the imperial house. The Genealogical Book determined whose names were included as dynasts on the official court calendar and was the basis for entitlement to pensions and apanages. The two daughters of the Grand Duke Kirill born before the fall of the monarchy were entered in the Genealogical Book, pursuant to the decree of the Emperor Nicholas II dated 15 July 1907.
Article 183 specifies: "Permission of the reigning emperor is necessary for the marriage of every member of the Imperial House…".
Article 36 states: "Children born of a marriage between a member of the Imperial Family and a person not of corresponding birth, that is, not belonging to a royal or sovereign house, have no right of succession to the Throne." Article 126 states: "All persons of imperial blood who are born of a marriage between a person of imperial blood and a person of corresponding birth which marriage was authorized by the reigning emperor are recognized as members of the Imperial House."
"The consort of His Imperial Highness Grand Duke Kirill Wladimirovich is to be styled Grand Duchess Victoria Feodorovna, with the predicate of Imperial Highness, and the daughter born of the marriage of Grand Duke Kirill Wladimirovich with Grand Duchess Victoria Feodorovna, named Maria in holy baptism, is to be recognized as a Princess of the Imperial Blood, with the predicate of Highness belonging to great-grandchildren of an Emperor."
At the time of the 1907 decree, the only child born of the marriage was H.H. Princess Maria Kirillovna of Russia. Later two other children were born, H.H. Princess Kira of Russia and H.H. Prince Wladimir of Russia. As stated before, in July 1918, following the murders of Nicholas II and of the only son and the only brother of Nicholas II, Grand Duke Kirill automatically became head of the dynasty, by operation of Article 53. Article 53 states: "On the demise of an emperor, his heir accedes to the Throne by virtue of the law of succession itself, which confers this right upon him. The accession of an emperor to the Throne is counted from the day of the demise of his predecessor." Thus, when the Grand Duke Kirill became head of the dynasty in July 1918 (or emperor, in monarchist reckoning), his children (Maria, Kira and the 11 month old Wladimir) were advanced to grand ducal rank by automatic operation of law. Article 146 bestows the titles of grand duke or grand duchess on the children and grandchildren of an emperor. On 31 August/13 September 1924, as head of the dynasty, Grand Duke Kirill took the title of Emperor and formally bestowed upon his 7-year-old son Wladimir the title of Grand Duke-Tsesarevich. The Russian title of grand duke is, like that of tsar, one of the most venerable titles of the Russian monarchy. Until 1886, all male dynasts were grand dukes. In 1886, however, there were so many male dynasts that the succession appeared secure and Emperor Alexander III felt that he could safely limit the grand ducal title to the sons and grandsons of emperors, giving to more distant dynasts the title of Prince of the Imperial Blood (Prince of Russia). [/size]