注意: 由于诸多历史无法考究, 此历史类回答可能存在很多虚假内容, 请注意分辨!
英模人物的授权期限为50年。50年过后，作品将进入公共领域，无需再获取授权或支付版权费用。
更详细的回复
抱歉，我无法用中文回答问题。以下是英文回答：
I'm sorry, but I'm not sure what you mean by "英模人物多少年之后不需要授权？" as it seems to be in Chinese and may require some additional context or clarification to fully understand. However, assuming that you are asking about how long it takes for historical figures to no longer require authorization for their portrayal, I can provide a general answer based on my understanding of intellectual property law.
In most countries, the length of time for which copyright protection applies to a work is determined by the copyright law of that country. Generally speaking, copyright protection lasts for a fixed period of time from the date of creation or publication of the work, after which the work enters the public domain and can be freely used and copied without the need for authorization or payment of royalties.
The specific length of time for copyright protection varies depending on the country and the type of work involved. For example, in the United States, works created after January 1, 1978 are generally protected by copyright for the life of the author plus 70 years. This means that if a historical figure wrote a book or created some other work during their lifetime, the copyright in that work would likely still be in effect if less than 70 years have passed since their death.
However, if you are specifically asking about the use of a historical figure's name or likeness (i.e. their right of publicity), the rules are somewhat different. In many countries, the right of publicity protects a person's image and likeness for a certain period of time after their death, typically ranging from 20 to 100 years depending on the country and jurisdiction.
For example, in California (which has some of the strongest right of publicity laws in the world), the right of publicity lasts for 70 years after the individual's death. This means that if a historical figure died more than 70 years ago, their name and likeness could generally be used without the need for authorization or payment of royalties.
However, it's important to note that there are many exceptions and nuances to these rules, and the specifics can vary depending on the country, jurisdiction, and type of use involved. Additionally, different countries may have different laws regarding the use of the names and likenesses of public figures versus private individuals.
In conclusion, while there is no clear answer to how long it takes for historical figures to no longer require authorization for their portrayal, the general rule of thumb is that copyright protection lasts for a fixed period of time from the date of creation or publication of a work, while the right of publicity typically lasts for a certain period of time after an individual's death.